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A012364 E.g.f.: sec(tan(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5... 0
1, 0, 1, 6, 37, 260, 2317, 24178, 288937, 3858312, 57255609, 933952030, 16622217357, 320373757964, 6649221916677, 147840789218442, 3506147948661457, 88343770525310736, 2356871357851041777 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..18.

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Sec[Tan[x]Exp[x]], {x, 0, nn}], x] Range[ 0, nn]!] (* Harvey P. Dale, Mar 07 2015 *)

CROSSREFS

Sequence in context: A140712 A079751 A088312 * A012719 A300171 A218298

Adjacent sequences:  A012361 A012362 A012363 * A012365 A012366 A012367

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

Definition clarified by Harvey P. Dale, Mar 07 2015

STATUS

approved

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Last modified May 22 22:13 EDT 2022. Contains 353959 sequences. (Running on oeis4.)