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 A245130 #7 Jul 23 2025 11:28:25 %S A245130 5,5,25,41,275,505,4005,8193,68855,147117,1277485,2807617,24937335, %T A245130 55854349,504209895,1145384915,10467805625,24038991995,221828315005, %U A245130 513848349931,4778788229935,11147995960319,104342997162795 %N A245130 Number of length n 0..4 arrays least squares fitting to a zero slope straight line, with a single point taken as having zero slope. %C A245130 Column 4 of A245134 %H A245130 R. H. Hardin, <a href="/A245130/b245130.txt">Table of n, a(n) for n = 1..210</a> %e A245130 Some solutions for n=10 %e A245130 ..1....0....2....2....0....2....2....1....2....2....1....0....0....0....0....1 %e A245130 ..4....1....2....0....2....0....4....1....3....3....4....4....4....4....4....4 %e A245130 ..0....3....1....3....1....2....4....1....1....1....1....3....1....3....3....3 %e A245130 ..2....2....4....0....2....0....4....2....3....3....1....0....3....0....2....2 %e A245130 ..1....4....2....1....4....1....0....4....0....1....4....3....1....4....3....3 %e A245130 ..4....2....2....0....1....0....2....2....0....2....4....2....3....2....3....1 %e A245130 ..4....2....0....1....1....2....2....0....3....2....1....3....2....1....4....4 %e A245130 ..1....3....3....3....0....0....3....4....1....2....3....1....0....2....2....0 %e A245130 ..2....0....1....1....1....2....4....0....3....0....0....3....1....2....0....3 %e A245130 ..1....1....3....1....2....1....3....1....2....4....3....1....3....2....3....3 %K A245130 nonn %O A245130 1,1 %A A245130 _R. H. Hardin_, Jul 12 2014