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 A060180 #9 Aug 17 2024 01:34:47
%S A060180 1,1,4,6,11,15,28,43,74,103,148,213,296,476,679,990,1133,1707,2225,
%T A060180 3260,4591,6042,7343,9374,13774,18262,25244,30379,39768,47295,66471,
%U A060180 87903,115570,139802,173605,215878,271434,369256,466904,569623,664775
%N A060180 Sum of distinct orders of degree-n even permutations.
%e A060180 Set of orders of all degree 5 even permutations is {1,2,3,5} so a(5)=1+2+3+5=11.
%Y A060180 Cf. A060014, A060015, A060179.
%K A060180 easy,nonn
%O A060180 1,3
%A A060180 _Vladeta Jovovic_, Mar 19 2001
%E A060180 More terms from _David Wasserman_, May 29 2002