A181940 - OEIS

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A181940

a(0)=0, and there are a(n) terms between a(n) and the nearest a(n)+1.

0, 1, 0, 2, 0, 1, 3, 1, 0, 2, 4, 2, 0, 1, 3, 5, 3, 1, 0, 2, 4, 6, 4, 2, 0, 1, 3, 5, 7, 5, 3, 1, 0, 2, 4, 6, 8, 6, 4, 2, 0, 1, 3, 5, 7, 9, 7, 5, 3, 1, 0, 2, 4, 6, 8, 10, 8, 6, 4, 2, 0, 1, 3, 5, 7, 9, 11, 9, 7, 5, 3, 1, 0, 2, 4, 6, 8, 10, 12, 10, 8, 6, 4, 2, 0, 1, 3, 5, 7, 9, 11, 13, 11, 9, 7, 5, 3, 1, 0, 2, 4, 6, 8, 10, 12, 14 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,4`
	LINKS	`Table of n, a(n) for n=0..105.`
	FORMULA	`a(A000217(n))=n.`
	PROG	`(PARI) a_list(N)={my(a=vector(2N), c=0); for(i=2, N, a[i]=c++; my(j=i); for(k=1, c-1, a[j-=(-1)^k(c-k+1)]=c-k); i+=c); vecextract(a, 2^N-1)}`
	CROSSREFS	`Sequence in context: A137712 A194711 A168532 * A093555 A065432 A094184` `Adjacent sequences: A181937 A181938 A181939 * A181941 A181942 A181943`
	KEYWORD	`nonn`
	AUTHOR	`Eric Angelini and M. F. Hasler, Apr 03 2012`
	STATUS	`approved`

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Last modified May 24 02:16 EDT 2013. Contains 225613 sequences.