A235569 - OEIS

%I #4 Jan 12 2014 07:11:03

%S 398,4670,53728,599834,6353336,63238254,592286060,5248500942,

%T 44325853698,359137867202,2808635827492,21308292745362,

%U 157513614896438,1138612324985928,8073652014782322,56303627107020326,387036789065682550

%N Number of (n+1)X(4+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise

%C Column 4 of A235573

%H R. H. Hardin, <a href="/A235569/b235569.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 12 2014