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 A194785 #6 Jul 22 2025 12:36:56 %S A194785 79,1101,10121,80961,631373,5029741,41587186,358138793,3210593393, %T A194785 29914171526,289187454251 %N A194785 Number of lower triangles of a (2n+5)X(2n+5) 0..n array with new values introduced in row major order 0..n and no element unequal to more than one horizontal or vertical neighbor. %C A194785 Row 7 of A194778 %e A194785 Some solutions for n=2 containing a 2 %e A194785 ..0..................0..................0..................0 %e A194785 ..0.0................1.1................0.0................0.0 %e A194785 ..0.0.0..............1.1.1..............1.1.1..............1.1.1 %e A194785 ..1.1.1.1............1.1.1.1............1.1.1.2............1.1.1.1 %e A194785 ..1.1.1.1.1..........1.1.1.1.0..........1.1.1.2.2..........2.2.2.2.2 %e A194785 ..1.1.1.1.1.0........1.1.1.1.0.0........1.1.1.2.2.2........2.2.2.2.2.2 %e A194785 ..1.1.1.1.1.0.0......1.1.1.1.0.0.2......1.1.1.2.2.2.2......1.1.1.1.1.1.1 %e A194785 ..1.1.1.1.1.0.0.0....1.1.1.1.0.0.2.2....1.1.1.2.2.2.2.1....1.1.1.1.1.1.1.1 %e A194785 ..1.1.1.1.1.0.0.0.2..1.1.1.1.0.0.2.2.0..1.1.1.2.2.2.2.1.1..2.2.2.2.2.2.2.2.2 %K A194785 nonn %O A194785 1,1 %A A194785 _R. H. Hardin_ Sep 02 2011