A023533 - OEIS

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A023533

a(n) = 1 if n of form m(m+1)(m+2)/6, otherwise 0.

1, 1, 0, 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, 1, 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, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`a(A000292(n))=1; a(A145397(n))=0; a(n)=1-A014306(n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 14 2008]`
	LINKS	`Index entries for characteristic functions`
	MATHEMATICA	`With[{ms=Table[m(m+1)(m+2)/6, {m, 0, 20}]}, Table[If[MemberQ[ms, n], 1, 0], {n, 0, 100}]] (* From Harvey P. Dale, Jul 25 2011 *)`
	CROSSREFS	`Sequence in context: A113047 A127692 A014305 * A010052 A039985 A127239` `Adjacent sequences: A023530 A023531 A023532 * A023534 A023535 A023536`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 16 12:15 EST 2012. Contains 205909 sequences.