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 A184697 #7 Jun 02 2025 03:50:32 %S A184697 1,2,6,14,34,74,154,304,580,1066,1901,3304,5610,9332,15241,24476, %T A184697 38721,60418,93088,141765,213590,318608,470873,689907,1002660,1446141, %U A184697 2070897,2945590,4163079,5848345,8168863,11348145,15683285,21567664,29520301 %N A184697 Number of strings of numbers x(i=1..n) in 0..3 with sum i*x(i) equal to n*3. %C A184697 Column 3 of A184703 %H A184697 R. H. Hardin, <a href="/A184697/b184697.txt">Table of n, a(n) for n = 1..200</a> %e A184697 All solutions for n=4 %e A184697 ..0....1....3....1....0....2....2....1....3....3....0....0....2....2 %e A184697 ..3....2....0....0....2....0....2....1....3....1....0....1....1....3 %e A184697 ..2....1....3....1....0....2....2....3....1....1....0....2....0....0 %e A184697 ..0....1....0....2....2....1....0....0....0....1....3....1....2....1 %K A184697 nonn %O A184697 1,2 %A A184697 _R. H. Hardin_ Jan 20 2011