id:A144513 - OEIS Search Results

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a(n) = Sum((n+k+2)!/((n-k)!*k!*2^k),k=0..n).

+0
2

2, 18, 162, 1670, 19980, 274932, 4296278, 75324762, 1466031690, 31386435410, 733391707752, 18578222154648, 507246285802802, 14851746921266010, 464244744007818090, 15431886798641124662, 543593886328031841828, 20228083875146926867932, 792934721766833544369830 (list; graph; listen)

	OFFSET	`0,1`
	MAPLE	`f2:=proc(n) local k; add((n+k+2)!/((n-k)!k!2^k), k=0..n); end; [seq(f2(n), n=0..50)];`
	CROSSREFS	`Equals 2*A001514. Cf. A001515.` `Sequence in context: A052876 A121933 A108550 this_sequence A037518 A037721 A005260` `Adjacent sequences: A144510 A144511 A144512 this_sequence A144514 A144515 A144516`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 16 2008`

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.

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