A254908 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2423, 5939, 14137, 40492, 109250, 258031, 576326, 1231872, 2547861, 5124950, 10170603, 19679796, 37067302, 68991907, 127544546, 232985318, 421049046, 754742881, 1343411988, 2377050180, 4185913747, 7337463337, 12807179775

Offset

1,1

Comments

Row 2 of A254907

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..0..0..1..1..0....0..1..0..0..0..1....1..1..1..1..0..1....1..0..0..1..1..0
..1..0..0..0..0..0....1..0..0..1..0..1....1..0..1..1..1..0....1..0..0..1..0..1
..0..0..0..0..1..1....1..0..0..0..0..1....1..1..1..0..1..0....0..0..0..1..1..1
..0..1..1..1..1..1....0..1..1..0..1..1....0..1..1..1..1..1....0..1..1..1..1..1

Crossrefs

Sequence in context: A204367 A131759 A254901 * A257203 A156120 A078868

Adjacent sequences: A254905 A254906 A254907 * A254909 A254910 A254911

Keyword

nonn

Author

R. H. Hardin, Feb 10 2015

Status

approved