A258745 Order of general affine group AGL(n,2) (=A028365(n)) divided by (n+1).

1, 1, 8, 336, 64512, 53329920, 184308203520, 2621599886868480, 152122702768688332800, 35820150273699719298416640, 34112245508649716682268134604800, 131089993748184007771243790830298726400, 2029650642403883210241235064170615545004032000

Offset: 0

Author

Max Alekseyev, Jun 08 2015

Keywords

• nonn

Links

• Max Alekseyev, Table of n, a(n) for n = 0..100
• Abdalla G. M. Ahmed, Matt Pharr, Victor Ostromoukhov, and Hui Huang, SZ Sequences: Binary-Based (0, 2^q)-Sequences, arXiv:2505.20434 [cs.GR], 2025. See pp. 7, 12.
• Putnam Exam. 1999, Question A6, Amer. Math. Monthly 107 (Oct 2000), 721-732; see p. 725.

Formula

a(n) = A028365(n) / (n+1) = 2^n * A002884(n) / (n+1) = 2^n * n! * A053601(n) / (n+1).