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A013165
sec(arctanh(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+115/4!*x^4-500/5!*x^5...
0
1, 0, 4, -6, 115, -500, 8830, -70770, 1316825, -15886440, 324218600, -5249917750, 119185529675, -2412502361100, 61104527105050, -1476059511449250, 41607421213320625, -1162370434739930000
OFFSET
0,3
CROSSREFS
Sequence in context: A219507 A367878 A012934 * A337466 A052672 A375697
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved