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 A183951 #7 Jun 02 2025 03:23:21 %S A183951 1,2,7,32,161,770,3539,15601,65909,268008,1051270,3988203,14668943, %T A183951 52424801,182419618,619151665,2053195642,6662236128,21181322973, %U A183951 66063536142,202362531609,609394911084,1805804155160,5270044397919 %N A183951 Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i) equal to n^2*7. %C A183951 Column 7 of A183953 %H A183951 R. H. Hardin, <a href="/A183951/b183951.txt">Table of n, a(n) for n = 1..52</a> %e A183951 Some solutions for n=4 %e A183951 ..7....5....4....7....3....3....1....2....1....2....6....5....3....6....5....0 %e A183951 ..3....7....7....4....0....5....4....7....5....6....1....4....1....2....0....4 %e A183951 ..5....7....0....1....5....1....7....2....3....6....6....3....1....2....3....0 %e A183951 ..3....1....5....5....4....5....2....4....4....2....3....4....6....5....5....6 %K A183951 nonn %O A183951 1,2 %A A183951 _R. H. Hardin_ Jan 08 2011