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 A184233 #7 Jun 02 2025 03:26:23 %S A184233 1,1,1,1,2,4,4,7,19,47,71,207,474,1077,2262,4729,9770,18932,39277, %T A184233 75259,142407,269217,504234,930683,1699058,3071779,5553557,9841969, %U A184233 17407209,30656831,53305283,92690067,159391413,274236367,467061289,794526219 %N A184233 Number of strings of numbers x(i=1..n) in 0..2 with sum i^2*x(i)^2 equal to n^2*4. %C A184233 Column 2 of A184240 %H A184233 R. H. Hardin, <a href="/A184233/b184233.txt">Table of n, a(n) for n = 1..75</a> %e A184233 All solutions for n=5 %e A184233 ..0....0 %e A184233 ..0....0 %e A184233 ..0....2 %e A184233 ..0....2 %e A184233 ..2....0 %K A184233 nonn %O A184233 1,5 %A A184233 _R. H. Hardin_ Jan 10 2011