id:A135860 - OEIS Search Results

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a(n) = C(n(n+1), n).

+0
3

1, 2, 15, 220, 4845, 142506, 5245786, 231917400, 11969016345, 706252528630, 46897636623981, 3461014728350400, 281014969393251275, 24894763097057357700, 2389461906843449885700, 247012484980695576597296 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) is divisible by (n+1): a(n)/(n+1) = A135861(n). a(n) is divisible by (n^2+1): a(n)/(n^2+1) = A135862(n).`
	PROGRAM	`(PARI) a(n)=binomial(n*(n+1), n)`
	CROSSREFS	`Cf. A135861, A135862.` `Adjacent sequences: A135857 A135858 A135859 this_sequence A135861 A135862 A135863` `Sequence in context: A099718 A143881 A132493 this_sequence A087962 A140054 A099085`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Dec 02 2007`

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.

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