id:A144661 - OEIS Search Results

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a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} Sum_{l=0..n} (i+j+k+l)!/(i!*j!*k!*l!).

+0
3

1, 65, 7365, 1107697, 191448941, 35899051101, 7101534312685, 1458965717496881, 308290573348183629, 66577182435768923245, 14629025943480502591445, 3260160391173522631759533, 735119604833362632050789701, 167408468505328518543519208949, 38448088693846486556578015883325 (list; graph; listen)

	OFFSET	`0,2`
	MAPLE	`f:=n->add( add( add( add( (i+j+k+l)!/(i!j!k!*l!), i=0..n), j=0..n), k=0..n), l=0..n); [seq(f(n), n=0..20)];`
	CROSSREFS	`Cf. A030662, A144660, A144662.` `Sequence in context: A116104 A116121 A118707 this_sequence A093265 A120801 A084225` `Adjacent sequences: A144658 A144659 A144660 this_sequence A144662 A144663 A144664`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Feb 01 2009`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

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