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 A222952 #5 Jul 23 2025 03:18:35 %S A222952 0,36302,8579208,3084748094,690124074740,194406198823968, %T A222952 44586928533264392 %N A222952 Number of nX4 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope. %C A222952 Column 4 of A222953 %e A222952 Some solutions for n=3 %e A222952 ..0..0..2..2....3..2..2..0....3..0..0..2....1..0..0..3....0..2..2..2 %e A222952 ..1..2..2..0....3..0..0..3....0..0..0..0....3..0..2..1....3..0..2..3 %e A222952 ..3..2..2..0....0..0..2..3....2..0..2..1....2..0..2..1....2..0..2..1 %K A222952 nonn %O A222952 1,2 %A A222952 _R. H. Hardin_ Mar 10 2013