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 A273735 #5 May 28 2016 20:07:04 %S A273735 1,1,1,1,1,1,1,1,2,3,4,5,6,7,8,16,24,32,40,48,56,64,128,192,256,320, %T A273735 384,448,512,1024,1536,2048,2560,3072,3584,4096,8192,12288,16384, %U A273735 20480,24576,28672,32768,65536,98304,131072,163840,196608,229376,262144,524288 %N A273735 Number of permutations of n elements divided by the number of 7-ary heaps on n+1 elements. %H A273735 Alois P. Heinz, <a href="/A273735/b273735.txt">Table of n, a(n) for n = 0..1000</a> %H A273735 Wikipedia, <a href="https://en.wikipedia.org/wiki/D-ary_heap">D-ary heap</a> %F A273735 a(n) = A000142(n)/A273694(n+1). %Y A273735 Column k=7 of A273730. %Y A273735 Cf. A000142, A273694. %K A273735 nonn %O A273735 0,9 %A A273735 _Alois P. Heinz_, May 28 2016