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 A271754 #5 Apr 13 2016 14:55:48 %S A271754 0,1,10,63,365,2110,12521,77133,495408,3321545,23241681,169563944, %T A271754 1288195931,10176462413,83473288546,709925146315,6251616698625, %U A271754 56926598141054,535352734428349,5193455071192121,51913950093082800,534160387907563869,5651905462025615573 %N A271754 Number of set partitions of [n+3] such that n is the largest element of the last block. %H A271754 Alois P. Heinz, <a href="/A271754/b271754.txt">Table of n, a(n) for n = 1..574</a> %H A271754 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %F A271754 a(n) = A271466(n+3,n). %e A271754 a(3) = 10: 12456|3, 1456|23, 1456|2|3, 145|26|3, 146|25|3, 14|256|3, 156|24|3, 15|246|3, 16|245|3, 1|2456|3. %Y A271754 A diagonal of A271466. %K A271754 nonn %O A271754 1,3 %A A271754 _Alois P. Heinz_, Apr 13 2016