A111405 - OEIS

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A111405 - OEIS

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A111405

a(n) = f(f(n+1)) - f(f(n)), where f(0) = 0 and f(m) = bigomega(m) = A001222(m) for m > 0.

2

0, 0, 0, 1, -1, 1, -1, 1, 0, 0, -1, 1, -1, 1, 0, 1, -2, 1, -1, 1, 0, 0, -1, 2, -1, 0, 0, 0, -1, 1, -1, 1, 0, 0, 0, 1, -2, 1, 0, 1, -2, 1, -1, 1, 0, 0, -1, 1, 0, 0, 0, 0, -1, 2, -1, 1, -1, 0, -1, 2, -2, 1, 0, 1, -1, 0, -1, 1, 0, 0, -1, 1, -1, 1, 0, 0, 0, 0, -1, 1, 1, -1, -1, 2, -1, 0, 0, 1, -2, 2, -1, 0, 0, 0, 0, 1, -2, 1, 0, 1, -2

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

OFFSET

0,17

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..20000

PROG

(PARI)

f(n) = if(n==0, 0, bigomega(n));

A111405(n) = f(f(n+1)) - f(f(n)); \\ Antti Karttunen, Oct 07 2017

CROSSREFS

Cf. A001222, A111407.

Sequence in context: A211229 A335621 A316675 * A089053 A214979 A068462

Adjacent sequences: A111402 A111403 A111404 * A111406 A111407 A111408

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Nov 12 2005

EXTENSIONS

Description clarified by Antti Karttunen, Oct 07 2017

STATUS

approved