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 A003936 #21 Jun 24 2025 05:47:38
%S A003936 27930968965434591767112450048000,
%T A003936 109777561863482259035023554842176139436811616256000,
%U A003936 1536234346098532793158147848149455029037710018156586598400000000,23626386639924457166562360847447514533996582031250000000000000000000000000
%N A003936 Order of universal Chevalley group B_7(q), q = prime power.
%D A003936 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 A003936 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 A003936 <a href="/index/Gre#groups">Index entries for sequences related to groups</a>.
%F A003936 a(n) = B(A000961(n + 1), 7) where B(q,n) is defined in A003920. - _Sean A. Irvine_, Sep 22 2015
%t A003936 B[q_, n_] := q^(n^2) * Product[q^(2*k) - 1, {k, 1, n}]; Table[B[q, 7], {q, Select[Range[10], PrimePowerQ]}] (* _Amiram Eldar_, Jun 24 2025 *)
%Y A003936 Cf. A000961, A003920, A003931, A003932, A003933, A003934, A003935, A003937.
%K A003936 nonn,easy
%O A003936 1,1
%A A003936 _N. J. A. Sloane_
%E A003936 a(3)-a(4) from _Sean A. Irvine_, Sep 22 2015