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A013098
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tanh(arcsinh(x)+tan(x)) = 2*x-15/3!*x^3+457/5!*x^5-30289/7!*x^7...
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1
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2, -15, 457, -30289, 3469345, -608926329, 151766090881, -50946876706129, 22157750605438913, -12118460218882345193, 8139938757873193425313, -6587354373887296232631681, 6321346340322177807347908193
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OFFSET
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0,1
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LINKS
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Vaclav Kotesovec, Table of n, a(n) for n = 0..200
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FORMULA
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Limit n->infinity (|a(n)|/(2*n+1)!)^(1/(2*n+1)) = 1.2646735395769... - Vaclav Kotesovec, Nov 01 2013
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MATHEMATICA
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Table[n!*SeriesCoefficient[Tanh[ArcSinh[x]+Tan[x]], {x, 0, n}], {n, 1, 41, 2}] (* Vaclav Kotesovec, Nov 01 2013 *)
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CROSSREFS
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Sequence in context: A139810 A012943 A013059 * A158109 A357856 A177394
Adjacent sequences: A013095 A013096 A013097 * A013099 A013100 A013101
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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STATUS
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approved
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