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A307094
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a(n) = Sum_{k=0..n} (-1)^k * binomial(n^2,k^2).
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2
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1, 0, -2, 117, -9634, 12625, 6612982405, -59596651685928, 718060704631041758, 93531932148176228605941, -94958916373783601251815537977, 135510731474135489426391897083350463
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OFFSET
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0,3
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LINKS
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FORMULA
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MATHEMATICA
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a[n_] := Sum[(-1)^k * Binomial[n^2, k^2], {k, 0, n}]; Array[a, 12, 0] (* Amiram Eldar, May 20 2021 *)
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PROG
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(PARI) {a(n) = sum(k=0, n, (-1)^k*binomial(n^2, k^2))}
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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