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A012631
cosh(arcsinh(x)*arctan(x))=1+12/4!*x^4-360/6!*x^6+20048/8!*x^8...
0
1, 0, 12, -360, 20048, -1794240, 235532352, -42633182592, 10177055117568, -3097788814190592, 1171100833288338432, -538330446029312133120, 295703061186623293870080, -191289947652383750277120000
OFFSET
0,3
CROSSREFS
Sequence in context: A012627 A012384 A012429 * A327986 A279182 A002674
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved