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A012876
sec(sech(x)*log(x+1))=1+1/2!*x^2-3/3!*x^3+4/4!*x^4-40/5!*x^5...
0
1, 0, 1, -3, 4, -40, 370, -2100, 19052, -224712, 2295380, -27161420, 388309832, -5572831680, 85093639488, -1453531202760, 26088826973648, -491011275101888, 9922199896825168, -211576194636993072
OFFSET
0,4
CROSSREFS
Sequence in context: A032836 A167760 A012472 * A300882 A348225 A172144
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved