A258745 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Max Alekseyev, Table of n, a(n) for n = 0..100

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).

CROSSREFS

Sequence in context: A374307 A285370 A247730 * A071306 A214511 A117082

Adjacent sequences: A258742 A258743 A258744 * A258746 A258747 A258748

KEYWORD

nonn

AUTHOR

Max Alekseyev, Jun 08 2015

STATUS

approved