id:A102518 - OEIS Search Results

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Sum{k=0..n, C(n,k)*sum{j=0..k, C(3k,3j)}}.

+0
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1, 3, 27, 243, 2187, 19683, 177147, 1594323, 14348907, 129140163, 1162261467, 10460353203, 94143178827, 847288609443, 7625597484987, 68630377364883, 617673396283947, 5559060566555523, 50031545098999707 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Binomial transform of A007613.`
	FORMULA	`a(n)=3^(2n-1)+2*0^k/3; a(n+1)=A013708(n).`
	CROSSREFS	`Sequence in context: A065100 A035088 A013708 this_sequence A074117 A037763 A037651` `Adjacent sequences: A102515 A102516 A102517 this_sequence A102519 A102520 A102521`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 13 2005`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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