A012847 - OEIS

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A012847

arcsinh(sec(x)*arctanh(x))=x+4/3!*x^3+28/5!*x^5+152/7!*x^7+6928/9!*x^9...

1, 4, 28, 152, 6928, 2225408, 348750400, 38567316608, 5024551512320, 2238520490011648, 1265695140964379648, 555587429710072952832, 218348017328527789264896, 124784882666107086189330432 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A145544 A006302 A123520 * A128721 A053524 A125687` `Adjacent sequences: A012844 A012845 A012846 * A012848 A012849 A012850`
	KEYWORD	`nonn`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 14 05:09 EST 2012. Contains 205570 sequences.