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A246583
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G.f.: x^((k^2+k)/2)/(mul(1-x^i,i=1..k)*mul(1+x^r,r=1..oo)) with k = 4.
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3
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 2, -1, 2, -2, 3, -4, 3, -6, 5, -9, 6, -12, 10, -16, 13, -20, 20, -26, 26, -32, 37, -41, 47, -51, 63, -65, 78, -81, 101, -103, 123, -128, 155, -161, 187, -199, 232, -247, 278, -302, 341, -371, 407, -449, 495, -545, 589, -654, 711, -786, 843, -936, 1011, -1116, 1194, -1320, 1423, -1563, 1674
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OFFSET
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0,15
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REFERENCES
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Fulman, Jason. Random matrix theory over finite fields. Bull. Amer. Math. Soc. (N.S.) 39 (2002), no. 1, 51--85. MR1864086 (2002i:60012). See top of page 70, Eq. 3, with k=4.
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LINKS
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FORMULA
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a(n) ~ (-1)^n * 3^(3/4) * n^(1/4) * exp(sqrt(n/6)*Pi) / (2^(15/4)*Pi^2). - Vaclav Kotesovec, Mar 12 2016
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MAPLE
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fSp:=proc(k) local a, i, r;
a:=x^((k^2+k)/2)/mul(1-x^i, i=1..k);
a:=a/mul(1+x^r, r=1..101);
series(a, x, 101);
seriestolist(%);
end;
fSp(4);
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MATHEMATICA
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nmax = 100; CoefficientList[Series[x^10/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)) * Product[1/(1+x^k), {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Mar 11 2016 *)
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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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