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A009655 Expansion of tan(log(1+x)^2). 2
0, 0, 2, -6, 22, -100, 788, -8568, 103416, -1307808, 17722512, -264361680, 4373968080, -79413478560, 1558387903200, -32713320769920, 731007454396800, -17347090012492800, 436154519763744000, -11585396062022112000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

EXAMPLE

tan(log(x+1)^2) = 2/2!*x^2-6/3!*x^3+22/4!*x^4-100/5!*x^5...

MATHEMATICA

Tan[ Log[ 1+x ]^2 ]

CROSSREFS

Sequence in context: A009585 A012267 A012268 * A002772 A000140 A079263

Adjacent sequences:  A009652 A009653 A009654 * A009656 A009657 A009658

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997.

STATUS

approved

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Last modified November 27 16:30 EST 2014. Contains 250240 sequences.