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A012935 sech(tan(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+45/4!*x^4-300/5!*x^5... 0
1, 0, -4, 6, 45, -300, -534, 18102, -53375, -1330056, 14429056, 83284630, -3017899731, 8484163116, 613472266078, -8040573553530, -103350766263711, 3850271965266992, -4102891850851420, -1601296818449786010 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..19.

CROSSREFS

Sequence in context: A306842 A284634 A077100 * A013166 A174653 A274215

Adjacent sequences:  A012932 A012933 A012934 * A012936 A012937 A012938

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified July 5 20:21 EDT 2020. Contains 335473 sequences. (Running on oeis4.)