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 A263069 #8 Mar 23 2016 12:50:15
%S A263069 1,7087261,4659168491711401,7687300579969605991710001,
%T A263069 19133358944433370977791260580721121,
%U A263069 60169662022264019813634467045726478557798101,220079308019032269943223432841210561656944209845808241,894709632166224106718347951886305028154659386016685862593012481
%N A263069 Number of lattice paths from {n}^9 to {0}^9 using steps that decrement one or more components by one.
%H A263069 Alois P. Heinz, <a href="/A263069/b263069.txt">Table of n, a(n) for n = 0..50</a>
%F A263069 a(n) ~ sqrt(c) * d^n / (Pi*n)^4, where d = 7400694480.0494436216324852038000444393262965328... and c = 0.0365684849906610318536810681059888603001404... . - _Vaclav Kotesovec_, Mar 23 2016
%t A263069 With[{k = 9}, Table[Sum[Sum[(-1)^i*Binomial[j, i]*Binomial[j - i, n]^k, {i, 0, j}], {j, 0, k*n}], {n, 0, 10}]] (* _Vaclav Kotesovec_, Mar 22 2016 *)
%Y A263069 Column k=9 of A262809.
%K A263069 nonn
%O A263069 0,2
%A A263069 _Alois P. Heinz_, Oct 08 2015