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A348024
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a(n) = [x^n] Product_{k=1..2*n} (x + (-1)^k * k).
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2
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1, 1, -13, -87, 2609, 34965, -1638841, -33411007, 2128380881, 58501278297, -4709853961605, -163166745402375, 15875893807564465, 664163782026582877, -75766955207796981345, -3716140360596415682175, 486265092408065178623265, 27363821966293458296896305, -4039473192629570940395992765
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listen;
history;
text;
internal format)
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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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PROG
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(PARI) a(n) = polcoef(prod(k=1, 2*n, x+(-1)^k*k), n);
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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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