A028371 a(n) = (2^(n-1)-1)!*2^((2^(n-1)-1)-1).

1, 24, 322560, 21424936845312000, 8829205774994708066835865418197893120000000

Offset: 2

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 2..9
• I. Strazdins, Universal affine classification of Boolean functions, Acta Applic. Math. 46 (1997), 147-167.

Crossrefs

Cf. A002866.

Programs

Magma

[(Factorial(2^(n-1)-1))*2^((2^(n-1)-1)-1): n in [2..8]]; // Vincenzo Librandi, Jun 03 2011

Formula

a(n) = A002866(2^(n-1)-1).