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 A271758 #5 Apr 13 2016 15:19:39 %S A271758 0,1,130,2703,33365,340030,3195161,29058813,262138728,2377526345, %T A271758 21850848681,204453592904,1953119434331,19080748941293, %U A271758 190810410926266,1954112246621755,20497535793993225,220206906232309694,2422414243364061229,27278730807823249481 %N A271758 Number of set partitions of [n+7] such that n is the largest element of the last block. %H A271758 Alois P. Heinz, <a href="/A271758/b271758.txt">Table of n, a(n) for n = 1..570</a> %H A271758 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %F A271758 a(n) = A271466(n+7,n). %e A271758 a(2) = 1: 13456789|2. %Y A271758 A diagonal of A271466. %K A271758 nonn %O A271758 1,3 %A A271758 _Alois P. Heinz_, Apr 13 2016