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A026723 a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026714. 0
1, 3, 8, 20, 49, 117, 280, 656, 1551, 3597, 8442, 19460, 45457, 104387, 243086, 556842, 1294027, 2959369, 6867428, 15687806, 36368875, 83015759, 192321728, 438755532, 1015963203, 2316887259, 5363009706, 12226893148, 28295070847 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..28.

CROSSREFS

Sequence in context: A018793 A018792 A018791 * A038746 A126876 A090757

Adjacent sequences:  A026720 A026721 A026722 * A026724 A026725 A026726

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 14 07:52 EST 2018. Contains 318090 sequences. (Running on oeis4.)