A013149 - OEIS

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A013149

cosh(tanh(x)+arctan(x))=1+4/2!*x^2-16/4!*x^4+64/6!*x^6+4096/8!*x^8...

1, 4, -16, 64, 4096, -480896, 54717440, -7775895552, 1454255472640, -360442602684416, 116460747215831040, -47685470462142971904, 24020257118743960748032, -14514884376044102613991424 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A155518 A005401 A002923 * A175065 A033140 A181879` `Adjacent sequences: A013146 A013147 A013148 * A013150 A013151 A013152`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 15 20:26 EST 2012. Contains 205852 sequences.