id:A107872 - OEIS Search Results

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Column 1 of triangle A107870; a(n) = C( n*(n+1)/2 + n+2, n).

+0
3

1, 4, 21, 165, 1820, 26334, 475020, 10295472, 260932815, 7575968400, 247994680648, 9036996468045, 362827605867363, 15913388077274800, 757000487505568680, 38819452599736372800, 2134712294190092847615 (list; graph; listen)

	OFFSET	`0,2`
	PROGRAM	`(PARI) a(n)=binomial(n*(n+1)/2+n+2, n)`
	CROSSREFS	`Cf. A107870, A107871.` `Sequence in context: A060072 A157503 A144010 this_sequence A008858 A078670 A163948` `Adjacent sequences: A107869 A107870 A107871 this_sequence A107873 A107874 A107875`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jun 04 2005`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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