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A098275
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Coefficients in a simultaneous approximation to Li(2,-1) and Li(3,-1).
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1
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1, 8, 264, 13040, 778840, 51955008, 3725735664, 281152383072, 22035642730200, 1778348612268800, 146898506147371264, 12366649337021296512, 1057604322007893443056, 91656070874708097813440
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| W. Zudilin, Approximations to -, di and trilogarithms
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FORMULA
| Sum[i=0..n, Sum[j=0..n C(n, i)^2*C(n, j)^2*C(n+i, n)*C(n+j, n)]].
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PROG
| (PARI) a(n)=sum(i=0, n, sum(j=0, n, binomial(n, i)^2*binomial(n, j)^2*binomial(n+i, n)*binomial(i+j, i)))
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CROSSREFS
| Cf. A005258, A098274.
Sequence in context: A162083 A081058 A003386 * A129424 A159496 A045479
Adjacent sequences: A098272 A098273 A098274 * A098276 A098277 A098278
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KEYWORD
| nonn,easy
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AUTHOR
| Ralf Stephan, Sep 03 2004
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