A013114 - OEIS

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A013114

sech(arcsinh(x)+arctan(x))=1-4/2!*x^2+104/4!*x^4-6790/6!*x^6...

1, -4, 104, -6790, 827480, -162019450, 46518314300, -18413421592150, 9610889961530000, -6395770003655763250, 5285420552751908562500, -5310341702734086669088750, 6374725468204682712703775000 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A012958 A012984 A202683 * A158114 A082736 A157039` `Adjacent sequences: A013111 A013112 A013113 * A013115 A013116 A013117`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 16 05:32 EST 2012. Contains 205860 sequences.