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A028367 a(n) = (2^n-2)!. 1
1, 2, 720, 87178291200, 265252859812191058636308480000000, 31469973260387937525653122354950764088012280797258232192163168247821107200000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..6.

I. Strazdins, Universal affine classification of Boolean functions, Acta Applic. Math. 46 (1997), 147-167.

MATHEMATICA

Table[(2^n - 2)!, {n, 7}] (* Vincenzo Librandi, Jan 05 2020 *)

PROG

(PARI) a(n) = (2^n-2)!; \\ Michel Marcus, Jan 04 2020

(MAGMA) [Factorial(2^n-2): n in [1..7]]; // Vincenzo Librandi, Jan 05 2020

CROSSREFS

Cf. A028366.

Sequence in context: A159564 A185667 A119781 * A000197 A036298 A153923

Adjacent sequences:  A028364 A028365 A028366 * A028368 A028369 A028370

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

Offset corrected by Sean A. Irvine, Jan 03 2020

STATUS

approved

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Last modified January 21 05:23 EST 2020. Contains 331104 sequences. (Running on oeis4.)