id:A080498 - OEIS Search Results

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a(n) = (n-c_1)(n-c_2)...(n-c_k) where c_k is the k-th composite number and is also the largest composite number < n.

+0
4

1, 1, 1, 1, 1, 2, 3, 8, 15, 48, 210, 1152, 3780, 19200, 62370, 322560, 2162160, 17418240, 81081000, 567705600, 2481078600, 16907304960, 146659312800, 1504935936000, 8799558768000, 76435881984000, 819678899239200 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`a(6) = (6-4) = 2. a(10) = (10-4)(10-6)(10-8)(10-9) = 48.`
	CROSSREFS	`Cf. A080497, A072513, A080500.` `Adjacent sequences: A080495 A080496 A080497 this_sequence A080499 A080500 A080501` `Sequence in context: A148012 A161178 A006882 this_sequence A148013 A133983 A005162`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 19 2003`
	EXTENSIONS	`More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003`

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.

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