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A026712 a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026703. 0
1, 3, 8, 20, 47, 111, 252, 582, 1303, 2977, 6618, 15028, 33269, 75255, 166152, 374860, 826115, 1860407, 4094612, 9208832, 20248703, 45495079, 99965896, 224440544, 492900919, 1106034259, 2428024608, 5446009600, 11951707547 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A006776 A050231 A136305 * A050232 A050233 A143662

Adjacent sequences:  A026709 A026710 A026711 * A026713 A026714 A026715

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 17 16:00 EST 2012. Contains 206050 sequences.