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 A270772 #5 Mar 22 2016 19:40:33
%S A270772 4140,29427,212983,1581303,12088759,95330022,776018428,6521484087,
%T A270772 56562256041,506044752411,4667150715433,44340683871574,
%U A270772 433622678716408,4361610383346991,45089441627371047,478706886902110399,5215712244172846891,58277269108672859458
%N A270772 Total sum of the sizes of all blocks with minimal element 9 in all set partitions of {1,2,...,n}.
%H A270772 Alois P. Heinz, <a href="/A270772/b270772.txt">Table of n, a(n) for n = 9..575</a>
%H A270772 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a>
%Y A270772 Column k=9 of A270702.
%Y A270772 A diagonal of A270701.
%K A270772 nonn
%O A270772 9,1
%A A270772 _Alois P. Heinz_, Mar 22 2016