A012385 - OEIS

A012385

sec(tan(x)*arcsin(x))=1+12/4!*x^4+360/6!*x^6+24080/8!*x^8...

1, 0, 12, 360, 24080, 2520000, 388466496, 82494828416, 23101056559360, 8247662229497856, 3656849221865495552, 1971359917831265798144, 1269841106398055675924480, 963238435991748310206791680

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Sec[Tan[x]ArcSin[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Apr 21 2024 *)

CROSSREFS

Sequence in context: A279182 A002674 A012552 * A012430 A012632 A081791

Adjacent sequences: A012382 A012383 A012384 * A012386 A012387 A012388

KEYWORD

nonn

AUTHOR

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

STATUS

approved