cp's OEIS Frontend

A250722 Number of (n+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

%I A250722 #7 Jul 28 2022 20:30:54
%S A250722 9,46,208,885,3605,14437,57397,228455,912438,3661515,14755226,
%T A250722 59674645,241996099,983339540,4001469252,16299591564,66441841973,
%U A250722 270971703338,1105502740041,4511347592849,18413367334909,75165710188419
%N A250722 Number of (n+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
%C A250722 Diagonal of A250729.
%H A250722 R. H. Hardin, <a href="/A250722/b250722.txt">Table of n, a(n) for n = 1..30</a>
%e A250722 Some solutions for n=4
%e A250722 ..0..0..0..0..0....0..0..0..0..0....0..1..0..0..1....0..0..0..0..0
%e A250722 ..0..0..0..0..0....0..0..0..0..0....1..0..1..1..1....0..0..0..0..0
%e A250722 ..0..0..0..1..0....0..0..0..0..0....0..1..1..1..1....0..0..0..0..1
%e A250722 ..0..0..1..0..1....0..0..0..0..0....0..1..1..1..1....0..0..0..0..1
%e A250722 ..1..1..0..1..1....1..0..1..0..0....0..1..1..1..1....1..0..0..1..1
%Y A250722 Cf. A250729.
%K A250722 nonn
%O A250722 1,1
%A A250722 _R. H. Hardin_, Nov 27 2014