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 A052487 #12 Apr 17 2023 10:35:24 %S A052487 1,2,3,6,7,17,7,26,20,46,9 %N A052487 Number of maximal irreducible integral matrix groups in n dimensions. %D A052487 Peter Engel, Geometric Crystallography, D. Reidel, Dordrecht, Holland, 1986. ISBN 90-277-2339-7. See Table 6.3, p. 111. %H A052487 J. H. Conway and N. J. A. Sloane, <a href="http://neilsloane.com/doc/Me146.pdf">Low-Dimensional Lattices II: Subgroups of GL(n,Z)</a>, Proc. Royal Soc. London, A 419 (1988), 29-68, <a href="https://doi.org/10.1098/rspa.1988.0095">doi:10.1098/rspa.1988.0095</a>. %H A052487 Bernd Souvignier, <a href="https://doi.org/10.1090/S0025-5718-1994-1213836-X">Irreducible finite integral matrix groups of degree 8 and 10</a>, Math. Comp. 63 (1994), 335-350. %Y A052487 Cf. A004027. %K A052487 nonn,more,nice %O A052487 1,2 %A A052487 Frederick G. Schmitt (fred(AT)marin.cc.ca.us), Mar 16 2000 %E A052487 a(10) from Souvignier and a(11) from Conway & Sloane added by _Andrey Zabolotskiy_, Apr 17 2023