A013268 sec(log(x+1)-sinh(x))=1+3/4!*x^4-10/5!*x^5+100/6!*x^6-693/7!*x^7...

1, 0, 0, 0, 3, -10, 100, -693, 6433, -59652, 656934, -7661335, 99643159, -1389188502, 20999144296, -338912370405, 5846415568641, -107035268122024, 2076101997603994, -42490682821565523

Offset

0,5

Links

Table of n, a(n) for n=0..19.

Mathematica

With[{nn=20}, CoefficientList[Series[Sec[Log[x+1]-Sinh[x]], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Dec 13 2012 *)

Crossrefs

Sequence in context: A013269 A013262 A013267 * A015487 A326428 A260813

Adjacent sequences: A013265 A013266 A013267 * A013269 A013270 A013271

Keyword

sign

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Status

approved