id:A147612 - OEIS Search Results

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If n is a Jacobsthal number then 1 else 0.

+0
3

1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`a(A001045(n)) = 1; a(A147613(n)) = 0.`
	LINKS	`Index entries for characteristic functions`
	FORMULA	`a(n) = 0^(j(n,1)*j(n,-1)) with j(n,i) = if n mod 2 = 0 then n else j((n+i)/2,-i).` `a(n)=A105348(n), n<>1. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 19 2008]`
	CROSSREFS	`Sequence in context: A164057 A140820 A167501 this_sequence A080545 A141735 A073097` `Adjacent sequences: A147609 A147610 A147611 this_sequence A147613 A147614 A147615`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 08 2008`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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