A066397 - OEIS

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A066397

Reversion of (1 - sqrt(1 - 4*x)) / (2*x) (the o.g.f. for the Catalan numbers A000108) as if it were an e.g.f.

1, -2, 6, -20, 50, 168, -4732, 54024, -356670, -1558040, 106069172, -2197188864, 26605890220, 22266781600, -12120090377400, 402165029201744, -7732409047854318, 38209542402620232, 4126723132306766900, -211906442415502467360, 5955735723962955009156 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`N. J. A. Sloane, Transforms` `Index entries for reversions of series`
	MAPLE	`read transforms; t1 := (1 - sqrt(1 - 4x)) / (2x); t2 := series(t1, x, 50); t2 := seriestolist(%); REVEGF(%);`
	CROSSREFS	`Sequence in context: A056820 A204422 A027558 * A060344 A045655 A110295` `Adjacent sequences: A066394 A066395 A066396 * A066398 A066399 A066400`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 24 2001`

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Last modified February 15 21:45 EST 2012. Contains 205860 sequences.