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 A271756 #5 Apr 13 2016 15:06:39 %S A271756 0,1,34,375,3149,24190,181265,1362669,10419024,81602489,657087105, %T A271756 5449808144,46591975883,410650926413,3730465450474,34912477523059, %U A271756 336408561147777,3335270965246766,33998967702498997,356088425256135353,3829087912372677696 %N A271756 Number of set partitions of [n+5] such that n is the largest element of the last block. %H A271756 Alois P. Heinz, <a href="/A271756/b271756.txt">Table of n, a(n) for n = 1..572</a> %H A271756 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %F A271756 a(n) = A271466(n+5,n). %e A271756 a(3) = 34: 1245678|3, 145678|23, 145678|2|3, 14567|28|3, 14568|27|3, 1456|278|3, 14578|26|3, 1457|268|3, 1458|267|3, 145|2678|3, 14678|25|3, 1467|258|3, 1468|257|3, 146|2578|3, 1478|256|3, 147|2568|3, 148|2567|3, 14|25678|3, 15678|24|3, 1567|248|3, 1568|247|3, 156|2478|3, 1578|246|3, 157|2468|3, 158|2467|3, 15|24678|3, 1678|245|3, 167|2458|3, 168|2457|3, 16|24578|3, 178|2456|3, 17|24568|3, 18|24567|3, 1|245678|3. %Y A271756 A diagonal of A271466. %K A271756 nonn %O A271756 1,3 %A A271756 _Alois P. Heinz_, Apr 13 2016