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A046857
a(n) = (2^n)!/(n!^2).
3
2, 6, 1120, 36324288000, 18272974787062050706056806400000, 244766458691906180755079840538505942906762183978675139272380197483053056000000000000
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..6.
C. S. Lorens,
Invertible Boolean functions
, IEEE Trans. Electron. Computers, EC-13 (1964), 529-541.
C. S. Lorens,
Invertible Boolean functions
, IEEE Trans. Electron. Computers, EC-13 (1964), 529-541. [Annotated scan of page 530 only]
CROSSREFS
Sequence in context:
A113569
A252739
A178773
*
A129454
A317251
A140258
Adjacent sequences:
A046854
A046855
A046856
*
A046858
A046859
A046860
KEYWORD
nonn
,
easy
AUTHOR
N. J. A. Sloane
STATUS
approved
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Last modified August 5 19:08 EDT 2024. Contains 374954 sequences. (Running on oeis4.)
