A222758 - OEIS

A222758

Irregular table of conjectured indices of Fibonacci numbers with exactly n 1-bits in their binary representation.

0, 1, 2, 3, 6, 4, 5, 9, 12, 7, 8, 11, 15, 18, 10, 13, 19, 14, 21, 24, 25, 17, 16, 20, 22, 30, 26, 32, 38, 23, 27, 28, 31, 35, 29, 34, 36, 39, 48, 33, 47, 37, 42, 45, 68, 40, 43, 54, 57, 60, 41, 51, 52, 53, 44, 49, 50, 61, 66, 59, 64, 46, 56, 55, 71, 77

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

OFFSET

0,3

COMMENTS

Every nonnegative integer appears.

LINKS

T. D. Noe, Rows n = 0..1000 of irregular triangle, flattened

EXAMPLE

The irregular table begins

{0},

{1, 2, 3, 6},

{4, 5, 9, 12},

{7, 8},

{11, 15, 18},

{10, 13, 19},

{14, 21, 24, 25},

{17},

{16, 20, 22, 30},

{26, 32},

{38},

{23, 27, 28, 31, 35}

MATHEMATICA

nn = 100; f = Fibonacci[Range[0, nn]]; t2 = Transpose[{Range[0, nn], f}]; Table[Select[Range[nn + 1], Count[IntegerDigits[t2[[#, 2]], 2], 1] == n &] - 1, {n, 0, nn/5}]

CROSSREFS

Cf. A004685 (Fibonacci numbers in binary), A222601, A222602, A222757.

Sequence in context: A064470 A194052 A178484 * A127915 A361966 A358026

Adjacent sequences: A222755 A222756 A222757 * A222759 A222760 A222761

KEYWORD

nonn,tabf

AUTHOR

T. D. Noe, Mar 11 2013

STATUS

approved