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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 October 2 02:58 EDT 2023. Contains 365831 sequences. (Running on oeis4.)