
LINKS

Table of n, a(n) for n=1..13.
H. U. Besche, The Small Groups library
H. U. Besche and Bettina Eick, Construction of finite groups, Journal of Symbolic Computation, Vol. 27, No. 4, Apr 15 1999, pp. 387404.
H. U. Besche and Bettina Eick, The groups of order at most 1000 except 512 and 768, Journal of Symbolic Computation, Vol. 27, No. 4, Apr 15 1999, pp. 405413.
H. U. Besche, B. Eick and E. A. O'Brien, The groups of order at most 2000, Electron. Res. Announc. Amer. Math. Soc. 7 (2001), 14.
J. H. Conway, Heiko Dietrich and E. A. O'Brien, Counting groups: gnus, moas and other exotica, The Mathematical Intelligencer, March 2008, Volume 30, Issue 2, pp 615.
Bettina Eick, and E. A. O'Brien, Enumerating pgroups. Group theory, J. Austral. Math. Soc. Ser. A 67 (1999), no. 2, 191205.
Eric Weisstein's World of Mathematics, Finite Group.
Index entries for sequences related to groups
