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A046856 (2^n)!/4^n. 3
630, 81729648000, 256963707943060088053923840000000, 30978254928194376001814792318154658399137088909801072314160618743948902400000000000000 (list; graph; refs; listen; history; internal format)
OFFSET

3,1

REFERENCES

C. S. Lorens, Invertible Boolean functions, IEEE Trans. Electron. Computers, EC-13 (1964), 529-541.

CROSSREFS

Sequence in context: A185849 A058832 A061163 * A045168 A119504 A020387

Adjacent sequences:  A046853 A046854 A046855 * A046857 A046858 A046859

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.