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 A287258 #6 May 22 2017 11:54:38 %S A287258 1,1,2,5,15,52,203,877,4140,21147,115974,678310,4205230,27497463, %T A287258 188884702,1358500111,10201272170,79783911418,648489059992, %U A287258 5467348769587,47728811273817,430751210469094,4013169321694153,38547034091725550,381252702363363969 %N A287258 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= eight. %H A287258 Alois P. Heinz, <a href="/A287258/b287258.txt">Table of n, a(n) for n = 0..580</a> %H A287258 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %F A287258 a(n) = A287216(n,8). %F A287258 a(n) = A000110(n) for n <= 9. %Y A287258 Column k=8 of A287216. %Y A287258 Cf. A000110. %K A287258 nonn %O A287258 0,3 %A A287258 _Alois P. Heinz_, May 22 2017