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A027334 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
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; 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) = 2*3^n.

a(n)=A008776(n), n>1. [From R. J. Mathar, Oct 23 2008]

CROSSREFS

Sequence in context: A238649 A268484 A085789 * A130505 A222204 A027289

Adjacent sequences:  A027331 A027332 A027333 * A027335 A027336 A027337

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 25 12:56 EDT 2017. Contains 292469 sequences.