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A027313 a(n) = Sum_{k=0..2n} (k+1) * A026323(n, 2n-k). 0
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; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

FORMULA

For n>1, a(n) = 3^(n+1).

CROSSREFS

Sequence in context: A136105 A239568 A198958 * A217365 A307040 A124089

Adjacent sequences:  A027310 A027311 A027312 * A027314 A027315 A027316

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 5 13:02 EDT 2020. Contains 333241 sequences. (Running on oeis4.)