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A074079
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Square array A(row,col) (listed in order A(0,0), A(0,1), A(1,0), A(0,2), A(1,1), A(2,0), A(0,3), etc.), giving essentially the same information as the triangle A074080 which shows only the upper triangular region.
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5
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1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 2, 1, 0, 0, 0, 0, 0, 0, 3, 2, 0, 0, 0, 0, 0, 0, 1, 3, 5, 1, 0, 0, 0, 0, 0, 0, 1, 3, 10, 3, 0, 0, 0, 0, 0, 0, 0, 0, 3, 17, 9, 1, 0, 0, 0, 0, 0, 0, 0, 1, 5, 28, 24, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 41, 57, 14, 1, 0, 0, 0
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OFFSET
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0,31
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LINKS
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FORMULA
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MAPLE
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A074079bi := (n, k) -> A073346bi(n, k)/(2^k);
A025581 := n -> binomial(1+floor((1/2)+sqrt(2*(1+n))), 2) - (n+1);
A002262 := n -> n - binomial(floor((1/2)+sqrt(2*(1+n))), 2);
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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