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A024333 Expansion of tanh(ln(1+x)^2)/2. 0
0, 0, 1, -3, 11, -50, 154, 756, -25572, 434736, -6324264, 84312360, -1014504360, 9750096720, -26179417200, -2263442045760, 92224441646400, -2623899775526400, 64132749053646720, -1393649719639125120, 25953090802663939200 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..20.

MATHEMATICA

Tanh[ Log[ 1+x ]^2 ]/2

CROSSREFS

A009789.

Sequence in context: A193319 A058733 A203163 * A024334 A162477 A115081

Adjacent sequences:  A024330 A024331 A024332 * A024334 A024335 A024336

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs 03/97.

STATUS

approved

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Last modified June 19 06:19 EDT 2013. Contains 226399 sequences.