This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A003943 #23 Jul 11 2025 08:53:14
%S A003943 27930968965434591767112450048000,
%T A003943 54888780931741129517511777421088069718405808128000,
%U A003943 1536234346098532793158147848149455029037710018156586598400000000,11813193319962228583281180423723757266998291015625000000000000000000000000
%N A003943 Order of simple Chevalley group B_7(q), q = prime power.
%D A003943 J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker and R. A. Wilson, ATLAS of Finite Groups. Oxford Univ. Press, 1985 [for best online version see https://oeis.org/wiki/Welcome#Links_to_Other_Sites], p. xvi.
%D A003943 H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.
%H A003943 Sean A. Irvine, <a href="/A003943/b003943.txt">Table of n, a(n) for n = 1..10</a>
%H A003943 <a href="/index/Gre#groups">Index entries for sequences related to groups</a>.
%F A003943 a(n) = b(A000961(n + 1), 7) where b(q,n) is defined in A003927. - _Sean A. Irvine_, Sep 22 2015
%t A003943 b[q_, n_] := q^(n^2) * Product[q^(2*k) - 1, {k, 1, n}] / GCD[2, q-1]; Table[b[q, 7], {q, Select[Range[5], PrimePowerQ]}] (* _Amiram Eldar_, Jul 11 2025 *)
%Y A003943 Cf. A000961, A003927, A003938, A003939, A003940, A003941, A003942, A003944.
%K A003943 nonn,easy
%O A003943 1,1
%A A003943 _N. J. A. Sloane_
%E A003943 a(3)-a(4) from _Sean A. Irvine_, Sep 22 2015