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 A060643 #8 Dec 05 2022 20:46:39 %S A060643 0,0,1,3,5,7,11,20,28,38,52,73,97,127,168,229,295,381,486,623,788,994, %T A060643 1247,1571,1954,2428,3002,3710,4557,5588,6826,8347,10141,12306,14879, %U A060643 17973,21633,26007,31177,37334,44579,53166,63253,75167,89126,105542,124738 %N A060643 Number of conjugacy classes in the symmetric group S_n that have even number of elements. %C A060643 The total number of conjugacy classes of S_n is the partition function p(n) (sequence A000041) and the number of conjugacy classes that have odd number of elements is given in A060632 so a(n) = A000041(n) - A060632(n) for n >= 1. %F A060643 a(n) = A000041(n) - A060632(n). %Y A060643 Cf. A000041, A060632. %K A060643 nonn %O A060643 1,4 %A A060643 Avi Peretz (njk(AT)netvision.net.il), Apr 17 2001 %E A060643 More terms from _Sean A. Irvine_, Dec 05 2022