A046857 - OEIS

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A046857

(2^n)!/(n!^2).

2, 6, 1120, 36324288000, 18272974787062050706056806400000, 244766458691906180755079840538505942906762183978675139272380197483053056000000000000 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	REFERENCES	`C. S. Lorens, Invertible Boolean functions, IEEE Trans. Electron. Computers, EC-13 (1964), 529-541.`
	CROSSREFS	`Sequence in context: A113569 A007338 A178773 * A129454 A140258 A071093` `Adjacent sequences: A046854 A046855 A046856 * A046858 A046859 A046860`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.