id:A081798 - OEIS Search Results

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Sum of three binomial coefficients.

+0
2

1, 7, 115, 2371, 54091, 1307377, 32803219, 844910395, 22188235867, 591446519797, 15953338537885, 434479441772845, 11927609772412075, 329653844941016785, 9163407745486783435, 255982736410338609931, 7181987671728091545787 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`y[n]= Sum[Binomial[n, k] Binomial[n + k, k] Binomial[n + 2k, k], {k, 0, n}]`
	CROSSREFS	`Adjacent sequences: A081795 A081796 A081797 this_sequence A081799 A081800 A081801` `Sequence in context: A086788 A127877 A082487 this_sequence A063399 A070067 A027502`
	KEYWORD	`easy,nonn`
	AUTHOR	`Emanuele Munarini (munarini(AT)mate.polimi.it), Apr 23 2003`

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Last modified October 15 20:12 EDT 2008. Contains 145099 sequences.

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