A011248 - OEIS

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A011248

Twice A000364.

2, 2, 10, 122, 2770, 101042, 5405530, 398721962, 38783024290, 4809759350882, 740742376475050, 138697748786275802, 31029068327114173810, 8174145018586247784722 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,1`
	REFERENCES	`G. Almkvist, Many correct digits of Pi, revisited, Amer. Math. Monthly, 104 (1997), 351-353.`
	LINKS	`Table of n, a(n) for n=0..13.`
	FORMULA	`E.g.f.: 2 - 2/Q(0), where Q(k)= 1 - (2k+1)(2k+2)/x + 1/x(2k+1)(2*k+2)/Q(k+1); (continued fraction). - Sergei N. Gladkovskii, May 01 2013`
	CROSSREFS	`Sequence in context: A181334 A032034 A002250 * A069240 A000371 A081088` `Adjacent sequences: A011245 A011246 A011247 * A011249 A011250 A011251`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane.`
	STATUS	`approved`

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Last modified May 21 08:28 EDT 2013. Contains 225478 sequences.