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 A194614 #6 May 24 2024 13:17:38 %S A194614 184,82057,279618492,7416076339907,1525002446582690839, %T A194614 2430369828996738172677912 %N A194614 Half the number of lower triangles of an (n+1) X (n+1) 0..7 array with no element equal to the average of its horizontal and vertical neighbors. %C A194614 Column 7 of A194615. %e A194614 Some solutions for 3 X 3 %e A194614 ..6......0......5......0......2......1......4......7......6......4......0 %e A194614 ..4.1....1.4....6.5....2.6....0.1....2.6....0.6....4.2....5.4....3.6....6.4 %e A194614 ..1.6.5..7.5.2..4.0.5..1.5.7..0.6.2..4.3.1..0.6.4..0.6.3..3.7.6..1.2.7..1.7.6 %Y A194614 Cf. A194615. %K A194614 nonn %O A194614 1,1 %A A194614 _R. H. Hardin_, Aug 30 2011