id:A027334 - OEIS Search Results

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a(n) = Sum{(k+1)*T(n,m-k)}, 0<=k<=m, where m=0 for n=1; m=n+1 for n >= 2; T given by A026148.

+0
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1, 3, 18, 54, 162, 486, 1458, 4374, 13122, 39366, 118098, 354294, 1062882, 3188646, 9565938, 28697814, 86093442, 258280326, 774840978, 2324522934, 6973568802, 20920706406, 62762119218, 188286357654, 564859072962 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`For n>1, a(n) = 2*3^n.`
	CROSSREFS	`Sequence in context: A138976 A064043 A085789 this_sequence A130505 A027289 A061317` `Adjacent sequences: A027331 A027332 A027333 this_sequence A027335 A027336 A027337`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified August 28 22:44 EDT 2008. Contains 143251 sequences.

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