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

%I

%S 1,24,322560,21424936845312000,

%T 8829205774994708066835865418197893120000000

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

%H Vincenzo Librandi, <a href="/A028371/b028371.txt">Table of n, a(n) for n = 2..9</a>

%H I. Strazdins, <a href="http://dx.doi.org/10.1023/A:1005769927571">Universal affine classification of Boolean functions</a>, Acta Applic. Math. 46 (1997), 147-167.

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

%o (MAGMA) [(Factorial(2^(n-1)-1))*2^((2^(n-1)-1)-1): n in [2..8]]; // _Vincenzo Librandi_, Jun 03 2011

%Y Cf. A002866.

%K nonn

%O 2,2

%A _N. J. A. Sloane_.

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Last modified October 25 17:22 EDT 2021. Contains 348255 sequences. (Running on oeis4.)