A259329 Ceiling of ((2^n)!)/(4^(n^2)).

1, 1, 1, 4872, 233707130922139265799, 26869353034366501299843095760875674032159666449783949888006055355073

Offset

1,4

Comments

The next term (a(7)) has 187 digits. - Harvey P. Dale, Dec 21 2025

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]

Mathematica

Table[Ceiling[(2^n)!/4^(n^2)], {n, 6}] (* Harvey P. Dale, Dec 21 2025 *)

Crossrefs

Sequence in context: A208629 A387752 A272077 * A390773 A200972 A382160

Adjacent sequences: A259326 A259327 A259328 * A259330 A259331 A259332

Keyword

nonn

Author

N. J. A. Sloane, Jun 24 2015

Status

approved