A259331 Ceiling of ((2^n)!)/(4^n*2^(2*n^2)).

1, 1, 1, 20, 228229620041151627, 6559900643155884106407005800995037605507731066841784640626478359

Offset: 1

Author

N. J. A. Sloane, Jun 24 2015

Keywords

• nonn

Links

• 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

Cf. A259326, A259327, A259328, A259329, A259330.

Programs

Maple

f:=n->((2^n)!)/(4^n*2^(2*n^2));
[seq(ceil(f(n)),n=1..6)];