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 A009228 Expansion of e.g.f.: exp(sinh(x)*cos(x)). 1
 1, 1, 1, -1, -7, -23, -23, 135, 1297, 4785, 6129, -102353, -894903, -4499623, -829671, 167774711, 1879275169, 9259741409, -1886150559, -697193437985, -7580265762535, -45391655836087, 85001467923145, 4778091975791591, 61409100961369265, 356972130348630673 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..200 MAPLE a:= n-> n! *coeff(series(exp(sinh(x)*cos(x)), x, n+1), x, n): seq (a(n), n=0..30); # Alois P. Heinz, Aug 22 2012 MATHEMATICA With[{nn=30}, CoefficientList[Series[Exp[Sinh[x]*Cos[x]], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Aug 22 2012 *) CROSSREFS Sequence in context: A121815 A025172 A115023 * A249438 A349230 A031450 Adjacent sequences: A009225 A009226 A009227 * A009229 A009230 A009231 KEYWORD sign,easy AUTHOR R. H. Hardin EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 Definition clarified by Harvey P. Dale, Aug 22 2012 STATUS approved

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Last modified May 23 01:37 EDT 2024. Contains 372758 sequences. (Running on oeis4.)