This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A009351 Expansion of log(1+sinh(x))*cos(x). 0
 0, 1, -1, 0, -4, 20, -121, 896, -7344, 68304, -711721, 8200192, -103603204, 1424807488, -21191898001, 339004274688, -5804468899584, 105924311382272, -2052443682726961, 42085719065821184, -910506730330968484 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS FORMULA a(n) ~ (n-1)! * (-1)^(n+1) * cos(log(1+sqrt(2))) / (log(1+sqrt(2)))^n. - Vaclav Kotesovec, Jan 23 2015 MATHEMATICA Log[ 1+Sinh[ x ] ]*Cos[ x ] CoefficientList[Series[Cos[x]*Log[1 + Sinh[x]], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *) CROSSREFS Sequence in context: A304069 A020028 A020118 * A121553 A067116 A067121 Adjacent sequences:  A009348 A009349 A009350 * A009352 A009353 A009354 KEYWORD sign,easy AUTHOR EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 26 01:08 EDT 2019. Contains 321479 sequences. (Running on oeis4.)