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Search: id:A138729
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| A138729 |
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a(n) = (-1) times free coefficient of numerator of 2n-th Du Bois-Reymond constant. |
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+0
6
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| 7, 25, 98, 1167, 4650, 30930, 1111860, 31100895, 13812610
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OFFSET
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1,1
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MATHEMATICA
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a = {7}; Do[p = FullSimplify[TrigToExp[ -3 - 2Residue[x^2/((Tan[x] - x) (1 + x^2)^n), {x, I}]]]; AppendTo[a, -First[p[[2]]]], {n, 2, 9}]; a (*Artur Jasinski*)
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CROSSREFS
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Cf. A062545, A062546, A085466, A085467, A138729, A138730, A138731, A138732, A138733.
Sequence in context: A048477 A117152 A058481 this_sequence A035509 A102900 A110240
Adjacent sequences: A138726 A138727 A138728 this_sequence A138730 A138731 A138732
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Mar 26 2008
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