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 A155510 #13 Dec 07 2024 10:28:10
%S A155510 1,2,3,4,6,9,12,16,21,24,25,36,40,45,46,56,60,80,81,96,106,120,126,
%T A155510 145,190,225,256,270,351,400,505,576,610,666,720,721,826,855,946,1071,
%U A155510 1072,1170,1225,1233,1330,1338,1345,1386,1450,1575,1576,1792,1890,2080,2241
%N A155510 Possible cardinalities of the set of all k-th powers of the order n permutations, where k and n are some positive integers.
%H A155510 Vladimir Letsko, <a href="http://www-old.fizmat.vspu.ru/doku.php?id=marathon:problem_101">Mathematical Marathon at VSPU, Problem 100</a> (in Russian)
%H A155510 Vladimir Letsko, <a href="http://dxdy.ru/topic16349.html">Mathematical Marathon at dxdy</a> (in Russian)
%e A155510 80 is in the sequence because the set {a^3|a in S_5} has 80 elements.
%Y A155510 Set of elements of A247005.
%Y A155510 Cf. A000012, A000142, A003483, A103619, A103620, A215716, A215717, A215718, A247006, A247007, A247008, A247009.
%K A155510 nonn
%O A155510 1,2
%A A155510 _Vladimir Letsko_, Jan 23 2009
%E A155510 Corrected and extended by _Max Alekseyev_, Feb 08 2009
%E A155510 Some missing terms added by _Max Alekseyev_, Jan 24 2010