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A094616
Row sums of A094615.
2
1, 8, 35, 126, 417, 1324, 4111, 12602, 38333, 116040, 350187, 1054678, 3172249, 9533156, 28632263, 85962354, 258018165, 774316672, 2323474339, 6971471630, 20916512081, 62753730588, 188269580415, 564825518506, 1694510109997
OFFSET
0,2
FORMULA
a(n) = 2(a(n-1)+3^n)+n-1, a(0)=1.
a(n) = 2*3^(n+1)-2^(n+2)-n-1. - Benoit Cloitre, May 23 2004
PROG
(PARI) a(n)=2*3^(n+1)-2^(n+2)-n-1
CROSSREFS
Cf. A094615.
Sequence in context: A248882 A292479 A301881 * A318020 A340522 A114569
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 14 2004
STATUS
approved