A066248 -id:A066248

Search: a066248 -id:a066248

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page 1

A066249

Inverse permutation to A066248.

+20
3

3, 1, 5, 2, 7, 4, 8, 6, 9, 10, 11, 12, 13, 16, 14, 18, 15, 22, 17, 28, 19, 30, 20, 36, 21, 40, 23, 42, 24, 46, 25, 52, 26, 58, 27, 60, 29, 66, 31, 70, 32, 72, 33, 78, 34, 82, 35, 88, 37, 96, 38, 100, 39, 102, 41, 106, 43, 108, 44, 112, 45, 126, 47, 130, 48, 136, 49, 138, 50

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Permutation of natural numbers.

LINKS

Table of n, a(n) for n=1..69.

Index entries for sequences that are permutations of the natural numbers

FORMULA

a(n) = (if n is even then A000040(n/2) else A002808((n+1)/2)) - 1.

CROSSREFS

Cf. A066248, A000040, A002808, A066251, A066253.

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 09 2001

STATUS

approved

A066252

a(n) = A066248(A066248(n)).

+20
1

4, 6, 2, 8, 1, 7, 3, 5, 9, 10, 11, 12, 13, 17, 19, 15, 21, 14, 25, 27, 31, 16, 35, 37, 39, 43, 47, 23, 49, 18, 53, 55, 57, 61, 63, 29, 67, 71, 73, 33, 77, 20, 81, 83, 85, 22, 89, 93, 95, 99, 101, 41, 103, 107, 111, 113, 117, 45, 119, 24, 123, 127, 129, 133, 137, 51, 141

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Permutation of natural numbers.

LINKS

Table of n, a(n) for n=1..67.

Index entries for sequences that are permutations of the natural numbers

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 09 2001

STATUS

approved

A066250

a(n) = if n+1 is prime then A049084(n+1)*2 - 1 else A066246(n+1)*2.

+10
3

1, 3, 2, 5, 4, 7, 6, 8, 10, 9, 12, 11, 14, 16, 18, 13, 20, 15, 22, 24, 26, 17, 28, 30, 32, 34, 36, 19, 38, 21, 40, 42, 44, 46, 48, 23, 50, 52, 54, 25, 56, 27, 58, 60, 62, 29, 64, 66, 68, 70, 72, 31, 74, 76, 78, 80, 82, 33, 84, 35, 86, 88, 90, 92, 94, 37, 96, 98, 100, 39, 102

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Permutation of natural numbers; inverse: A066251.

LINKS

Table of n, a(n) for n=1..71.

Index entries for sequences that are permutations of the natural numbers

FORMULA

a(n) = A026238(n+1)*2 - A010051(n+1).

CROSSREFS

Cf. A066251, A049084, A066246, A026238, A010051, A066248, A066254.

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 09 2001

STATUS

approved

A066251

Inverse permutation to A066250.

+10
3

1, 3, 2, 5, 4, 7, 6, 8, 10, 9, 12, 11, 16, 13, 18, 14, 22, 15, 28, 17, 30, 19, 36, 20, 40, 21, 42, 23, 46, 24, 52, 25, 58, 26, 60, 27, 66, 29, 70, 31, 72, 32, 78, 33, 82, 34, 88, 35, 96, 37, 100, 38, 102, 39, 106, 41, 108, 43, 112, 44, 126, 45, 130, 47, 136, 48, 138, 49, 148

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Permutation of natural numbers.

LINKS

Table of n, a(n) for n=1..69.

Index entries for sequences that are permutations of the natural numbers

FORMULA

a(n) = (if n is odd then A000040((n+1)/2) else A002808(n/2)) - 1.

CROSSREFS

Cf. A066250, A000040, A002808, A066248, A066255.