cp's OEIS Frontend

A195246 Number of lower triangles of an n X n 0..6 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.

%I A195246 #7 Jul 22 2025 12:42:17
%S A195246 7,103,4823,709613,329060365,481573562101,2226347741716207,
%T A195246 32533092875899015419,1503300467938958707014579,
%U A195246 219724247440207348239797551059,101603289677502667519178169906161081
%N A195246 Number of lower triangles of an n X n 0..6 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.
%C A195246 Column 6 of A195248
%e A195246 Some solutions for n=5
%e A195246 ..2..........0..........4..........4..........2..........4..........1
%e A195246 ..4.4........2.2........3.5........4.6........1.3........3.2........0.1
%e A195246 ..5.6.4......4.4.3......4.5.4......5.6.6......1.3.2......4.3.1......0.2.1
%e A195246 ..4.6.6.6....2.2.4.4....3.3.4.4....6.6.6.4....2.2.1.0....2.2.2.3....0.1.0.0
%e A195246 ..4.6.5.5.6..4.4.3.4.3..3.2.3.4.2..5.4.5.6.6..0.2.0.1.2..0.1.1.3.1..1.2.2.0.1
%K A195246 nonn
%O A195246 1,1
%A A195246 _R. H. Hardin_ Sep 13 2011