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A294040
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a(n) = e*(Gamma(2*n,1) - Gamma(n,1)).
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2
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0, 1, 14, 321, 13684, 986345, 108504786, 16926795529, 3554627458376, 966858672295089, 330665665961417590, 138879579704199815921, 70273067330329989586044, 42163840398198057552632281, 29599015959535037299068127994, 24034400959142450300350904324985
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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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MAPLE
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a := n -> exp(1)*(GAMMA(2*n, 1) - GAMMA(n, 1)):
seq(simplify(a(n)), n=0..15);
# Alternative:
A000522:= gfun:-rectoproc({(-x-2)*d(1+x)+(x+4)*d(x+2)-d(x+3), d(0) = 1, d(1) = 2, d(2) = 5}, d(x), remember):
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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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