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 A343822 #6 May 01 2021 07:35:05 %S A343822 1,2,3,4,5,6,7,8,9,10,11,12,13,14,16,17,18,19,20,23,24,25,26,27,30,31, %T A343822 32,33,34,38,39,40,41,44,46,47,48,53,54,55,59,60,61,62,67,68,69,74,75, %U A343822 76,82,83,89,90,95,97,103,104,110,111,118,125,131,139,146,167 %N A343822 Numbers k such that the alternating group A_k is not a Hurwitz group. %C A343822 Complement of A343821. %C A343822 See the classification in section 5 of the first Conder reference. The term 139 is erroneously omitted there, as pointed out in the second Conder reference [Section 3]. %H A343822 Marston D. E. Conder, <a href="https://doi.org/10.1112/jlms/s2-22.1.75">Generators for alternating and symmetric groups</a>, J. London Math. Soc. (2) 22 (1980), pp. 75-86. %H A343822 Marston D. E. Conder, <a href="https://doi.org/10.1017/S0004972700001738">Some results on quotients of triangle groups</a>, Bulletin of the Australian Mathematical Society, Volume 30, Issue 1, August 1984, pp. 73-90. %H A343822 J. J. Etayo Gordejuela and E. MartÃnez, <a href="https://doi.org/10.1016/j.jalgebra.2004.07.039">Alternating groups, Hurwitz groups and H^*-groups</a>, Journal of Algebra, 283 (2005), pp. 327-349. %Y A343822 Cf. A179982, A343821. %K A343822 nonn,fini,full %O A343822 1,2 %A A343822 _Eric M. Schmidt_, Apr 30 2021