id:A080212 - OEIS Search Results

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Binomial(n, smallest odd prime factor of n).

+0
4

1, 2, 1, 4, 1, 20, 1, 8, 84, 252, 1, 220, 1, 3432, 455, 16, 1, 816, 1, 15504, 1330, 705432, 1, 2024, 53130, 10400600, 2925, 1184040, 1, 4060, 1, 32, 5456, 2333606220, 324632, 7140, 1, 35345263800, 9139, 658008, 1, 11480, 1, 7669339132, 14190 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`For n>1: a(n)=1 iff n is prime.`
	CROSSREFS	`Cf. A078701, A080211, A080213.` `Sequence in context: A024539 A128271 A092891 this_sequence A009832 A016445 A130544` `Adjacent sequences: A080209 A080210 A080211 this_sequence A080213 A080214 A080215`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Feb 06 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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