This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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: A191340 A211229 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 22 04:02 EDT 2019. Contains 323473 sequences. (Running on oeis4.)