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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 1

%I #4 Feb 10 2015 09:54:36

%S 2423,5939,14137,40492,109250,258031,576326,1231872,2547861,5124950,

%T 10170603,19679796,37067302,68991907,127544546,232985318,421049046,

%U 754742881,1343411988,2377050180,4185913747,7337463337,12807179775

%N 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

%C Row 2 of A254907

%H R. H. Hardin, <a href="/A254908/b254908.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..1..0..0..1..1..0....0..1..0..0..0..1....1..1..1..1..0..1....1..0..0..1..1..0

%e ..1..0..0..0..0..0....1..0..0..1..0..1....1..0..1..1..1..0....1..0..0..1..0..1

%e ..0..0..0..0..1..1....1..0..0..0..0..1....1..1..1..0..1..0....0..0..0..1..1..1

%e ..0..1..1..1..1..1....0..1..1..0..1..1....0..1..1..1..1..1....0..1..1..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 10 2015

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Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)