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A013496 exp(tanh(x)-arctanh(x))=1-4/3!*x^3-8/5!*x^5+160/6!*x^6-992/7!*x^7... 0
1, 0, 0, -4, 0, -8, 160, -992, 1792, -50304, 484224, -4573952, 38725632, -738222080, 8292976640, -127954033664, 1743232565248, -34953731964928, 521161362997248, -10769261343309824, 188842450602393600 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

CROSSREFS

Sequence in context: A177900 A019249 A013440 * A187172 A081148 A187606

Adjacent sequences:  A013493 A013494 A013495 * A013497 A013498 A013499

KEYWORD

sign

AUTHOR

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

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Last modified February 16 21:51 EST 2012. Contains 205978 sequences.