id:A027313 - OEIS Search Results

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a(n) = Sum{(k+1)*T(n,2n-k)}, 0<=k<=2n, T given by A026323.

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1, 6, 27, 81, 243, 729, 2187, 6561, 19683, 59049, 177147, 531441, 1594323, 4782969, 14348907, 43046721, 129140163, 387420489, 1162261467, 3486784401, 10460353203, 31381059609, 94143178827, 282429536481, 847288609443 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`For n>1, a(n) = 3^(n+1).`
	CROSSREFS	`Sequence in context: A027276 A101970 A136105 this_sequence A124089 A100188 A131985` `Adjacent sequences: A027310 A027311 A027312 this_sequence A027314 A027315 A027316`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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