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 A184668 #7 Jun 02 2025 03:49:38 %S A184668 216912,88458672,30765364899,11348244616180,4110692224930359, %T A184668 1498459859767029015,545098899148923125052,198432026871542606565562, %U A184668 72218093862175663215790336,26285411777044349448747311771 %N A184668 Number of (n+1)X5 0..3 arrays with no 2X2 subblock summing to less than 6. %C A184668 Column 4 of A184673 %H A184668 R. H. Hardin, <a href="/A184668/b184668.txt">Table of n, a(n) for n = 1..200</a> %e A184668 Some solutions for 3X5 %e A184668 ..0..0..2..3..1....0..0..2..3..2....0..0..2..0..1....0..0..2..2..0 %e A184668 ..3..3..2..3..3....3..3..2..2..3....3..3..2..2..3....3..3..2..3..1 %e A184668 ..0..0..3..0..2....1..0..1..2..0....0..0..2..3..0....1..0..2..1..1 %K A184668 nonn %O A184668 1,1 %A A184668 _R. H. Hardin_ Jan 19 2011