id:A073354 - OEIS Search Results

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Binomial coefficient ( n, square-free kernel(n) ).

+0
2

1, 1, 1, 6, 1, 1, 1, 28, 84, 1, 1, 924, 1, 1, 1, 120, 1, 18564, 1, 184756, 1, 1, 1, 134596, 53130, 1, 2925, 40116600, 1, 1, 1, 496, 1, 1, 1, 1947792, 1, 1, 1, 847660528, 1, 1, 1, 2104098963720, 344867425584, 1, 1, 12271512, 85900584, 10272278170, 1 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`a(n)=1 iff n is square-free.`
	FORMULA	`a(n) = binomial(n, A007947(n)).`
	CROSSREFS	`Cf. A007947, A005117, A073353, A066503, A064549, A003557.` `Sequence in context: A166142 A050449 A108131 this_sequence A128423 A133419 A010134` `Adjacent sequences: A073351 A073352 A073353 this_sequence A073355 A073356 A073357`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 29 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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