A237347 - OEIS

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A237347

First differences of A078633.

4

3, 3, 2, 3, 2, 3, 2, 2, 3, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2

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

OFFSET

1,1

COMMENTS

a(n) = A078633(n+1) - A078633(n);

2 <= a(n) <= 3;

a(A049068(n)) = 2; a(A002620(n)) = 3;

A237347(n) = abs(A167752(n)) + 2.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a237347 n = a237347_list !! (n-1)

a237347_list = zipWith (-) (tail a078633_list) a078633_list

CROSSREFS

Sequence in context: A274709 A260896 A365711 * A075017 A060586 A076662

Adjacent sequences: A237344 A237345 A237346 * A237348 A237349 A237350

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Mar 18 2014

STATUS

approved