A012386 - OEIS

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A012386

sech(tan(x)*arcsin(x))=1-12/4!*x^4-360/6!*x^6-7280/8!*x^8...

0

1, 0, -12, -360, -7280, 504000, 121581504, 14369939584, 56810973440, -657138821830656, -255226784793623552, -45397358372525164544, 15722139759017802895360, 20152649683846086682296320

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

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

CROSSREFS

Sequence in context: A012553 A128043 A012431 * A130213 A012633 A009079

Adjacent sequences: A012383 A012384 A012385 * A012387 A012388 A012389

KEYWORD

sign

AUTHOR

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

STATUS

approved