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 A245131 #6 Jul 23 2025 11:28:32 %S A245131 6,6,36,66,552,1248,11856,29182,294024,754712,7864656,20741082, %T A245131 221051304,594135812,6435862704,17543490552,192393047844,530178286952, %U A245131 5870767076544,16318715568296,182113708337928,509795775623836 %N A245131 Number of length n 0..5 arrays least squares fitting to a zero slope straight line, with a single point taken as having zero slope. %C A245131 Column 5 of A245134 %H A245131 R. H. Hardin, <a href="/A245131/b245131.txt">Table of n, a(n) for n = 1..210</a> %e A245131 Some solutions for n=8 %e A245131 ..2....0....3....0....4....3....1....5....5....2....2....2....5....5....0....3 %e A245131 ..4....5....5....5....2....3....0....1....1....2....3....1....3....0....5....4 %e A245131 ..5....2....4....3....4....1....3....3....1....4....3....0....0....5....1....4 %e A245131 ..2....3....4....0....0....4....0....0....4....1....2....3....4....4....3....2 %e A245131 ..5....4....5....5....0....1....1....3....2....2....4....4....1....4....3....2 %e A245131 ..0....2....4....4....4....3....1....0....3....0....1....1....4....4....2....1 %e A245131 ..5....2....2....2....2....1....1....5....3....0....1....3....4....2....3....3 %e A245131 ..3....2....5....1....4....4....1....3....3....5....4....0....3....4....1....5 %K A245131 nonn %O A245131 1,1 %A A245131 _R. H. Hardin_, Jul 12 2014