id:A144514 - OEIS Search Results

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a(n) = Sum((n+k+3)!/((n-k)!*k!*2^k),k=0..n).

+0
2

6, 84, 1050, 13980, 205800, 3368316, 61075854, 1219445100, 26635157010, 632479986600, 16235529291696, 448220024574504, 13247429692101150, 417453231024613140, 13974133833217747650, 495278130521939366196, 18530507890959175097784, 729908595489477119015700 (list; graph; listen)

	OFFSET	`0,1`
	MAPLE	`f3:=proc(n) local k; add((n+k+3)!/((n-k)!k!2^k), k=0..n); end; [seq(f3(n), n=0..50)];`
	CROSSREFS	`Equals 6*A144506 (with a different offset). Cf. A001515.` `Sequence in context: A054605 A119576 A098982 this_sequence A011945 A113888 A163947` `Adjacent sequences: A144511 A144512 A144513 this_sequence A144515 A144516 A144517`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 16 2008`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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