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A104508
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Absolute row sums of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1+x-x^2)^n.
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2
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1, 2, 4, 9, 20, 47, 103, 198, 512, 1161, 1985, 5590, 13005, 21684, 59294, 142273, 270858, 634187, 1526399, 3256372, 6779657, 16020364, 37758202, 79702477, 164647757, 424655100, 940639154, 1709638551, 4675803604, 10774789429
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OFFSET
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0,2
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LINKS
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PROG
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(PARI) a(n)=sum(k=0, n, abs(polcoeff((1+x-x^2)^n, n+k)))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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