id:A154322 - OEIS Search Results

Search: id:A154322

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a(n)=1+n+C(n+3,5)

+0
2

1, 2, 4, 10, 26, 62, 133, 260, 471, 802, 1298, 2014, 3016, 4382, 6203, 8584, 11645, 15522, 20368, 26354, 33670, 42526, 53153, 65804, 80755, 98306, 118782, 142534, 169940, 201406, 237367, 278288, 324665, 377026, 435932 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of number triangle A113582.`
	FORMULA	`G.f.: (1-4x+7x^2-4x^3+x^4)/(1-x)^6;` `a(n)=(n+1)+sum{k=0..n, C(k+1,2)*C(n-k+1,2)}=(n+1)(n^4+4n^3+n^2-6n+120)/120;`
	CROSSREFS	`Sequence in context: A111564 A007021 A100605 this_sequence A090031 A055775 A090032` `Adjacent sequences: A154319 A154320 A154321 this_sequence A154323 A154324 A154325`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 07 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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