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 A287586 #5 May 26 2017 20:55:12 %S A287586 1,1,2,5,15,52,203,877,4140,20269,101873,520839,2690517,13976694, %T A287586 72797864,379609217,1981204605,10341627330,53967714273,281504203138, %U A287586 1467686630577,7649011738137,39850489168540,207560600018243,1080833575339527,5627230565442222 %N A287586 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than seven. %H A287586 Alois P. Heinz, <a href="/A287586/b287586.txt">Table of n, a(n) for n = 0..1000</a> %H A287586 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %F A287586 a(n) = A000110(n) for n <= 8. %Y A287586 Column k=7 of A287417. %Y A287586 Cf. A000110. %K A287586 nonn %O A287586 0,3 %A A287586 _Alois P. Heinz_, May 26 2017