cp's OEIS Frontend

A203100 Number of n X 7 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

%I A203100 #7 Apr 17 2022 19:50:32
%S A203100 1268,20174774,163621176194,1186165852092876,8968410661761080882,
%T A203100 68145439667266350435686,516228209623915573866603862,
%U A203100 3910082447672696425090538622374,29622112490764323854670076610636942
%N A203100 Number of n X 7 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
%C A203100 Column 7 of A203101.
%H A203100 R. H. Hardin, <a href="/A203100/b203100.txt">Table of n, a(n) for n = 1..55</a>
%e A203100 Some solutions for n=5
%e A203100 ..2..2..3..0..2..3..3....2..2..0..1..1..2..3....2..1..1..2..3..1..0
%e A203100 ..3..0..3..0..2..3..1....2..0..3..2..3..1..3....2..0..0..2..3..1..2
%e A203100 ..3..0..1..3..2..0..1....1..3..3..2..3..2..3....3..0..3..3..1..2..2
%e A203100 ..3..0..2..3..2..1..0....2..3..1..2..2..2..1....3..2..3..2..2..0..1
%e A203100 ..3..3..0..3..1..2..2....0..2..2..2..0..0..0....1..0..3..0..3..3..3
%Y A203100 Cf. A203101.
%K A203100 nonn
%O A203100 1,1
%A A203100 _R. H. Hardin_, Dec 29 2011