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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

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 A114569 A189599

Adjacent sequences:  A094613 A094614 A094615 * A094617 A094618 A094619

KEYWORD

nonn

AUTHOR

Clark Kimberling, May 14 2004

STATUS

approved

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Last modified March 29 05:39 EDT 2020. Contains 333105 sequences. (Running on oeis4.)