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 A252929 #6 Jul 23 2025 13:46:30 %S A252929 15,483,13976,315198,5385305,71297441,759337545,6725497344, %T A252929 50869309436,335549742230,1963313662947,10332594393296,49485574097413, %U A252929 217813226273441,888570804281664,3384240524056852,12109669540486657 %N A252929 Number of nX7 nonnegative integer arrays with upper left 0 and lower right n+7-6 and value increasing by 0 or 1 with every step right or down. %C A252929 Column 7 of A252930 %H A252929 R. H. Hardin, <a href="/A252929/b252929.txt">Table of n, a(n) for n = 1..210</a> %H A252929 R. H. Hardin, <a href="/A252929/a252929.txt">Empirical polynomial of degree 28</a> %F A252929 Empirical polynomial of degree 28 (see link above) %e A252929 Some solutions for n=3 %e A252929 ..0..1..1..1..1..2..3....0..1..1..2..3..3..4....0..1..2..2..3..3..4 %e A252929 ..1..1..1..2..2..3..3....1..2..2..2..3..3..4....0..1..2..2..3..3..4 %e A252929 ..2..2..2..2..3..4..4....2..2..2..3..3..3..4....1..2..2..2..3..3..4 %K A252929 nonn %O A252929 1,1 %A A252929 _R. H. Hardin_, Dec 24 2014