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A026679
Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026670.
0
1, 3, 8, 18, 41, 87, 190, 396, 851, 1761, 3754, 7740, 16419, 33777, 71410, 146676, 309319, 634605, 1335680, 2737830, 5753393, 11784519, 24732602, 50628768, 106142095, 217168749, 454874296, 930285390, 1947021505
OFFSET
0,2
CROSSREFS
Partial sums of A026677.
Sequence in context: A117080 A240135 A066425 * A371682 A191524 A026756
KEYWORD
nonn
STATUS
approved