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 A174073 #18 Feb 04 2024 18:19:29 %S A174073 1,1,2,3,24,100,594,4389,35744,325395,3288600,36489992,441091944, %T A174073 5770007009,81213883898,1223895060315,19662509172096,335472890422812, %U A174073 6057979283966814,115434096553014565,2314691409661484600,48723117262650147387,1074208020519754180896,24755214452825129257168 %N A174073 Number of permutations of length n without modular consecutive triples i,i+2,i+4. %D A174073 Wayne M. Dymacek, Isaac Lambert and Kyle Parsons, Arithmetic Progressions in Permutations, http://math.ku.edu/~ilambert/CN.pdf, 2012. %H A174073 Max Alekseyev, <a href="/A174073/b174073.txt">Table of n, a(n) for n = 0..100</a> %H A174073 Kyle Parsons, <a href="http://hdl.handle.net/11021/23093">Arithmetic Progressions in Permutations</a>, thesis, 2011. See Table 4 p. 12. %e A174073 For example, a(5) does not count the permutation (0,4,1,3,2) since 4,1,3 is an arithmetic progression of 2 mod(5). %Y A174073 Column k=0 of A216724. %Y A174073 Cf. A165960, A174072, A174074, A174075. %K A174073 nonn %O A174073 0,3 %A A174073 _Isaac Lambert_, Mar 06 2010 %E A174073 a(11)-a(17) from _Alois P. Heinz_, Apr 13 2021 %E A174073 Terms a(18) onward from _Max Alekseyev_, Feb 04 2024