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A012778
Expansion of e.g.f. sec(sec(x)*log(x+1)).
1
1, 0, 1, -3, 28, -160, 1630, -14700, 180668, -2227608, 32850740, -507842060, 8829277928, -162974579040, 3280768459280, -70166399557800, 1609085392223312, -39068177212368192, 1006531896581760976
OFFSET
0,4
LINKS
EXAMPLE
1 + (1/2!)*x^2 - (3/3!)*x^3 + (28/4!)*x^4 - (160/5!)*x^5 + ...
MAPLE
N:= 300: # number of terms desired
S:= series(sec(sec(x)*log(x+1)), x, N):
seq(coeff(S, x, j)*j!, j=0 .. N-1);
# Robert Israel, Feb 17 2013
CROSSREFS
Sequence in context: A145346 A184440 A012762 * A302522 A303405 A074922
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved