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 A184696 #7 Jun 02 2025 03:50:25 %S A184696 1,2,3,7,12,21,35,58,91,142,215,322,472,685,979,1385,1936,2684,3685, %T A184696 5023,6790,9119,12163,16130,21264,27887,36383,47249,61076,78621, %U A184696 100787,128714,163766,207643,262385,330506,415023,519630,648751,807768,1003113,1242574 %N A184696 Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i) equal to n*2. %C A184696 Column 2 of A184703 %H A184696 R. H. Hardin, <a href="/A184696/b184696.txt">Table of n, a(n) for n = 1..200</a> %e A184696 All solutions for n=4 %e A184696 ..0....1....0....0....2....2....1 %e A184696 ..2....0....0....1....1....0....2 %e A184696 ..0....1....0....2....0....2....1 %e A184696 ..1....1....2....0....1....0....0 %K A184696 nonn %O A184696 1,2 %A A184696 _R. H. Hardin_ Jan 20 2011