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 A183417 #7 Jul 22 2025 08:56:49 %S A183417 35,1920,118128,7798591,535504390,37791169786,2719090433234, %T A183417 198527626261156,14661270464301970,1092691428398410348, %U A183417 82050496246290924387,6199895182931575557720,470968211438917677149130 %N A183417 Number of nX4 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j. %C A183417 Column 4 of A183419 %H A183417 R. H. Hardin, <a href="/A183417/b183417.txt">Table of n, a(n) for n = 1..28</a> %e A183417 Some solutions for 6X4 %e A183417 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A183417 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A183417 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A183417 ..0..0..0..2....0..0..2..1....0..0..1..2....0..0..2..2....0..1..0..1 %e A183417 ..1..0..0..0....2..2..2..0....2..1..2..2....1..0..2..1....0..1..1..0 %e A183417 ..1..0..0..0....1..2..1..1....2..2..1..1....2..2..2..0....1..2..0..2 %K A183417 nonn %O A183417 1,1 %A A183417 _R. H. Hardin_ Jan 04 2011