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 A112664 #3 Mar 30 2012 17:27:47 %S A112664 2,3,18,21,138,156,52,84,28,12,4,1376,406,7,58,2544,3953,16686,5562, %T A112664 1854,618,162,54,6,47256,11814,1432,264,179,66,8 %N A112664 Lengths of k-cycles (k > 1) of permutation A114650 in order of their first appearance. %C A112664 Sequence A114728 without repetition. %e A112664 (792,1198,1401,995) is the first 4-cycle of A114650, all of the 32 preceding cycles (cf. A114727) have length 2, 3, 18, 21, 138, 156, 52, 84, 28 or 12 (ten different values), hence a(11) = 4. %Y A112664 Cf. A114650, A114728, A114727. %K A112664 nonn,more %O A112664 1,1 %A A112664 _Klaus Brockhaus_, Jan 11 2006