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A252787 Number of exponent-7 class 2 groups of order 7^n. 3
0, 0, 1, 3, 7, 28, 131, 26465, 2832610615, 18602165186505644, 1577146952504975321253720851 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 22 18:45 EDT 2021. Contains 348175 sequences. (Running on oeis4.)