A012747 - OEIS

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A012747

cosh(arctanh(x)*cos(x))=1+1/2!*x^2-3/4!*x^4+45/6!*x^6+2457/8!*x^8...

1, 1, -3, 45, 2457, 161625, 20549397, 3457938757, 772773915313, 221864504883633, 79479234590193325, 34768359140993612893, 18241340561609524790601, 11306811847252896133698825 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A163002 A117253 A012833 * A027637 A099168 A004105` `Adjacent sequences: A012744 A012745 A012746 * A012748 A012749 A012750`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.