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 A287259 #6 May 22 2017 11:55:10 %S A287259 1,1,2,5,15,52,203,877,4140,21147,115975,678569,4213081,27621156, %T A287259 190402182,1375129039,10374133545,81541494757,666269176903, %U A287259 5648127595636,49587725282894,450158439775999,4219372853286578,40779812327165914,405907919759151220 %N A287259 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= nine. %H A287259 Alois P. Heinz, <a href="/A287259/b287259.txt">Table of n, a(n) for n = 0..579</a> %H A287259 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %F A287259 a(n) = A287216(n,9). %F A287259 a(n) = A000110(n) for n <= 10. %Y A287259 Column k=9 of A287216. %Y A287259 Cf. A000110. %K A287259 nonn %O A287259 0,3 %A A287259 _Alois P. Heinz_, May 22 2017