id:A107864 - OEIS Search Results

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Column 2 of triangle A107862; a(n) = C( (n+1)*(n+2)/2 + n-1, n).

+0
4

1, 3, 21, 220, 3060, 53130, 1107568, 26978328, 752538150, 23667689815, 828931106355, 32006008361808, 1350990969850340, 61902409203193230, 3060335715568296000, 162392216278033616560, 9206887338937200407418 (list; graph; listen)

	OFFSET	`0,2`
	PROGRAM	`(PARI) a(n)=binomial((n+1)*(n+2)/2+n-1, n)`
	CROSSREFS	`Cf. A107862, A014068, A107864.` `Sequence in context: A107716 A032033 A099121 this_sequence A113663 A082545 A074638` `Adjacent sequences: A107861 A107862 A107863 this_sequence A107865 A107866 A107867`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jun 04 2005`

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

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