A252787 Number of exponent-7 class 2 groups of order 7^n.

0, 0, 1, 3, 7, 28, 131, 26465, 2832610615, 18602165186505644, 1577146952504975321253720851

Offset

0,4

Links

Table of n, a(n) for n=0..10.

J. H. Conway, Heiko Dietrich and E. A. O'Brien, Counting groups: gnus, moas and other exotica.

Bettina Eick and E. A. O'Brien, Enumerating p-groups. Group theory. J. Austral. Math. Soc. Ser. A 67 (1999), no. 2, 191-205.

E. A. O'Brien, Bibliography on the determination of finite groups.

Crossrefs

Cf. A090140, A252784, A252785, A252786.

Sequence in context: A321719 A309619 A143948 * A018989 A325258 A073126

Adjacent sequences: A252784 A252785 A252786 * A252788 A252789 A252790

Keyword

nonn,hard,more

Author

Eric M. Schmidt, Dec 21 2014

Status

approved