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 A322308 #12 Dec 03 2018 15:18:33 %S A322308 1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,128,6320,344872 %N A322308 Number of permutations sigma such that |sigma(i+j)-sigma(i)| >= 5 for 1 <= i <= n - j, 1 <= j <= 4. %C A322308 2 | a(n) for n > 1. %e A322308 a(25) = 2: [5,10,15,20,25,4,9,14,19,24,3,8,13,18,23,2,7,12,17,22,1,6,11,16,21] and its reverse. %Y A322308 Cf. A179958, A279214, A322281. %K A322308 nonn,more %O A322308 0,26 %A A322308 _Seiichi Manyama_, Dec 03 2018