A012748 - OEIS

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A012748

sec(arctanh(x)*cos(x))=1+1/2!*x^2+1/4!*x^4+25/6!*x^6+3617/8!*x^8...

1, 1, 1, 25, 3617, 340145, 40490657, 7034559753, 1668333374913, 504856533178465, 189500285350524865, 86696156445549770233, 47524548345395009982689, 30739504895562596416971025 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	CROSSREFS	`Sequence in context: A203186 A185826 A178026 * A036512 A053860 A091744` `Adjacent sequences: A012745 A012746 A012747 * A012749 A012750 A012751`
	KEYWORD	`nonn`
	AUTHOR	`Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)`

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.