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Search: id:A026712
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A026712 a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026703. +0
1
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; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A006776 A050231 A136305 this_sequence A050232 A050233 A143662

Adjacent sequences: A026709 A026710 A026711 this_sequence A026713 A026714 A026715

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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