# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a250957 Showing 1-1 of 1 %I A250957 #5 Nov 29 2014 07:08:25 %S A250957 170,34988,42534386,333998523952,15830978769561242, %T A250957 4633149318453116653026,8364724418212952351480546203, %U A250957 92715859612444518806837176313688042 %N A250957 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element %C A250957 Diagonal of A250965 %H A250957 R. H. Hardin, Table of n, a(n) for n = 1..9 %e A250957 Some solutions for n=2 %e A250957 ..1..0..0....3..2..0....2..0..0....2..0..0....3..0..0....3..0..2....0..0..0 %e A250957 ..1..2..1....3..2..0....3..1..0....3..3..1....2..3..1....2..0..2....3..2..3 %e A250957 ..1..1..1....2..2..1....1..3..1....1..1..2....0..1..1....3..0..3....0..1..1 %K A250957 nonn %O A250957 1,1 %A A250957 _R. H. Hardin_, Nov 29 2014 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE