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 A124938 #22 Feb 07 2025 14:28:52 %S A124938 0,0,0,0,2,4,3,5,4,21,4,36,3,27,40,49,5,91,2,358,56,27,3,807,79,26,64, %T A124938 617,2,1896,4 %N A124938 Number of non-solvable transitive Galois groups for polynomials of degree n. %C A124938 This sequence is A002106 (total number of transitive Galois groups) - A124937 (number of solvable transitive groups). %F A124938 a(n) = A002106(n) - A124937(n). - _Michel Marcus_, Nov 06 2013 %e A124938 a(5) = 2: for polynomials of degree 5 we have 2 non-solvable groups: A_5 (T5_4) and S_5 (T5_5) %o A124938 (GAP) "a(15)= "; l:=AllTransitiveGroups(NrMovedPoints,15,IsSolvable,false); # _Artur Jasinski_, Feb 04 2007 %o A124938 (Magma) for g in [1..45] do %o A124938 G:=TransitiveGroup(10,g); %o A124938 IsSolvable(G); %o A124938 end for; /* _Artur Jasinski_, Dec 03 2013 */ %Y A124938 Cf. A002106, A124937. %K A124938 nonn,more %O A124938 1,5 %A A124938 _Artur Jasinski_, Nov 13 2006 %E A124938 More terms from _Artur Jasinski_, Feb 04 2007 %E A124938 a(10) and a(12) corrected by _Artur Jasinski_, Dec 03 2013 %E A124938 More terms from _Alois P. Heinz_, Feb 02 2014