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 A174079 #2 Mar 31 2012 19:53:46 %S A174079 12,84,494,3696,30574 %N A174079 Number of circular permutations of length n with no consecutive triples i,i+2,i+4 (mod n) or i,i-2,i-4 (mod n). %C A174079 Circular permutations are permutations whose indices are from the ring of integers modulo n. %e A174079 For n=5 there are (5-1)!-a(5)=12 circular permutations with triples i,i+2,i+4 (mod 5) or triples i,i-2,i-4 (mod 5). An example of one is (0,3,1,2,4) because of the progression 0,3,1 (mod 5). %Y A174079 Cf. A078628, A174076, A174077, A174078. %K A174079 nonn %O A174079 5,1 %A A174079 _Isaac Lambert_, Mar 10 2010