id:A123312 - OEIS Search Results

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a(n) = A123311(n)/(n+1), where A123311 forms the central terms of triangle A123305.

+0
2

1, 1, 6, 84, 2010, 70596, 3331006, 199417056, 14559631506, 1259526351000, 126308710634414, 14434568970310656, 1854260500658184762, 264771440776810595320, 41635233706865669566110 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Triangle T=A123305 is defined by: (column k of T) = (k+1)*(column k of T^2) shifted to have an initial '1'; thus a(n) = A123311(n)/(n+1) is integer for n>=0.`
	CROSSREFS	`Cf. A123305; A123306, A123307, A123308, A123309, A123310, A123311.` `Adjacent sequences: A123309 A123310 A123311 this_sequence A123313 A123314 A123315` `Sequence in context: A113888 A128575 A014062 this_sequence A010794 A030031 A136597`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Sep 25 2006`

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Last modified October 12 11:54 EDT 2008. Contains 144829 sequences.

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