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 A184240 #7 Jun 02 2025 03:27:02 %S A184240 1,1,1,1,1,1,1,1,1,1,1,1,2,1,2,1,1,1,1,2,1,1,1,1,1,5,4,2,1,1,2,2,3,5, %T A184240 4,1,1,1,1,2,15,15,41,7,3,1,1,1,2,11,24,31,36,19,3,1,1,3,1,30,43,213, %U A184240 119,199,47,4,1,1,2,5,5,47,176,356,555,420,71,2,1,1,2,3,79,88,706,962,2531,2138 %N A184240 T(n,k)=Number of strings of numbers x(i=1..n) in 0..k with sum i^2*x(i)^2 equal to n^2*k^2. %C A184240 Table starts %C A184240 .1..1...1....1....1.....1.....1......1......1.......1.......1.......1.......1 %C A184240 .1..1...1....1....1.....1.....1......1......1.......1.......1.......1.......2 %C A184240 .1..1...2....1....1.....2.....1......1......3.......2.......2.......2.......2 %C A184240 .1..1...1....1....2.....2.....2......1......5.......3.......3.......2.......4 %C A184240 .2..2...5....3...15....11....30......5.....79......30......99......30.....129 %C A184240 .1..4...5...15...24....43....47.....88....155.....251.....249.....349.....507 %C A184240 .2..4..41...31..213...176...706....571...2355....1508....5431....3445...10802 %C A184240 .1..7..36..119..356...962..2108...3719...6688...13801...22721...31805...53339 %C A184240 .3.19.199..555.2531..5920.19178..32608..85718..133989..284012..450961..850956 %C A184240 .3.47.420.2138.9710.32442.97714.229978.570177.1186420.2444060.4476795.8278231 %H A184240 R. H. Hardin, <a href="/A184240/b184240.txt">Table of n, a(n) for n = 1..393</a> %e A184240 Some solutions for n=6 k=5 %e A184240 ..4....2....0....0....0....4....0....4....4....0....0....0....0....0....0....0 %e A184240 ..2....4....2....5....4....5....4....0....4....2....5....5....3....4....0....4 %e A184240 ..2....0....4....0....4....4....4....4....4....4....4....0....4....0....0....2 %e A184240 ..4....4....1....4....1....2....4....2....0....2....4....5....3....5....0....5 %e A184240 ..0....0....4....4....2....0....4....2....2....2....4....4....0....4....0....4 %e A184240 ..4....4....3....2....4....4....1....4....4....4....0....0....4....1....5....0 %Y A184240 Column 1 is A030273 %K A184240 nonn,tabl %O A184240 1,13 %A A184240 _R. H. Hardin_ Jan 10 2011