A013172 - OEIS

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A013172

exp(arctanh(x)+tan(x))=1+2*x+4/2!*x^2+12/3!*x^3+48/4!*x^4+232/5!*x^5...

1, 2, 4, 12, 48, 232, 1344, 8960, 68096, 580480, 5489024, 57192960, 649853952, 8028368896, 106867367936, 1530617461760, 23404867387392, 381866595811328, 6602987646386176, 120993556601405440 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..19.`
	CROSSREFS	`Sequence in context: A172452 A004527 A002871 * A052849 A098558 A152827` `Adjacent sequences: A013169 A013170 A013171 * A013173 A013174 A013175`
	KEYWORD	`nonn`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	STATUS	`approved`

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Last modified May 21 04:39 EDT 2013. Contains 225474 sequences.