A092300 2*5^(n^2+2n+1)*Product_{j=1..n} (25^j-1).

10, 30000, 58500000000, 71406562500000000000, 54478744277343750000000000000000, 25977486943588417053222656250000000000000000000, 7741894375438878098811060190200805664062500000000000000000000000, 1442040200190701731357565969692841463256627321243286132812500000000000000000000000000

Offset

0,1

Comments

The order of the p-Clifford group for an odd prime p is a*p^(n^2+2n+1)*Product_{j=1..n} (p^(2*j)-1), where a = gcd(p+1,4).

Links

Table of n, a(n) for n=0..7.

G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.

Crossrefs

Cf. A001309, A003956.

Cf. A092299 and A092301 (p=3), A092300 and A089989 (p=5), A090768 and A090769 (p=7), A090770 (p=2, although this is the wrong formula in that case).

Sequence in context: A181017 A360213 A055321 * A048916 A366313 A260797

Adjacent sequences: A092297 A092298 A092299 * A092301 A092302 A092303

Keyword

nonn

Author

N. J. A. Sloane, Feb 10 2004

Status

approved