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Search: id:A138733
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| A138733 |
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Second term of continued fraction for 2n-th Du Bois Reymond constant. |
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+0
6
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| 5, 190, 4531, 99232, 2125044, 45190209, 958768567, 20325471335, 430773893366, 9128872855695, 193450867955197, 4099389985205820, 86869246502331992, 1840823999333339814, 39008411877876819180, 826616742911186406242
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OFFSET
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1,1
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FORMULA
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a(n) = floor(1/C(2n)), where C(2n) is the 2n-th Du Bois Reymond constant. [From Max Alekseyev (maxale(AT)gmail.com), Sep 15 2009]
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MATHEMATICA
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a = {}; Do[AppendTo[a, Last[ContinuedFraction[FullSimplify[TrigToExp[ -3 - 2Residue[x^2/((Tan[x] - x) (1 + x^2)^n), {x, I}]]], 2]]], {n, 1, 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: A050239 A094081 A096543 this_sequence A015102 A086124 A100760
Adjacent sequences: A138730 A138731 A138732 this_sequence A138734 A138735 A138736
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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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EXTENSIONS
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Extended by Max Alekseyev (maxale(AT)gmail.com), Sep 15 2009
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