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A012532 sech(sinh(x)*sin(x)) = 1-12/4!*x^4+8848/8!*x^8-45051072/12!*x^12... 0
1, -12, 8848, -45051072, 840261660928, -41695924253002752, 4537436258866404364288, -951427888272965045905047552, 350377450379688317757442429616128, -211362906255307072670284412178232246272, 197818950974274356812042952303539935429787648 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

MATHEMATICA

With[{nn=40}, Take[CoefficientList[Series[Sech[Sinh[x]Sin[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 4}]] (* Harvey P. Dale, Nov 12 2017 *)

CROSSREFS

Sequence in context: A013513 A013480 A107254 * A012732 A001322 A159411

Adjacent sequences:  A012529 A012530 A012531 * A012533 A012534 A012535

KEYWORD

sign

AUTHOR

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

EXTENSIONS

More terms from Harvey P. Dale, Nov 12 2017

STATUS

approved

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Last modified October 23 18:19 EDT 2020. Contains 337975 sequences. (Running on oeis4.)