A178562 First differences of A178344.

1, 2, 1, 2, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, -2, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -10, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -3, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -18, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -3, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -11, 1, 1, 1

Offset

0,2

Links

Antti Karttunen, Table of n, a(n) for n = 0..65537

Formula

a(n) = A178344(n+1) - A178344(n).

Prog

(PARI)
A178344(n) = if(!n, 1, my(i=1, s=0); while(n, s+=prime(i)^(n%2); n >>= 1; i++); (s));
A178562(n) = (A178344(n+1)-A178344(n)); \\ Antti Karttunen, Sep 29 2018

Crossrefs

Sequence in context: A346831 A161780 A136571 * A232624 A287368 A108149

Adjacent sequences: A178559 A178560 A178561 * A178563 A178564 A178565

Keyword

sign,less

Author

Juri-Stepan Gerasimov, May 29 2010

Extensions

Two terms corrected by R. J. Mathar, May 31 2010

Status

approved