A235763 - OEIS

A235763

Number of (n+1) X (6+1) 0..1 arrays with the sum of each 2 X 2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.

%I #6 Mar 15 2023 11:06:25

%S 2482,55816,1310058,26947867,548550245,10315124920,190693042666,

%T 3383470907219,58972454432362,1000721111089237,16642224739736490,

%U 270150372438476479,4285984985234190573,66354310571145977712

%N Number of (n+1) X (6+1) 0..1 arrays with the sum of each 2 X 2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.

%C Column 6 of A235765.

%H R. H. Hardin, <a href="/A235763/b235763.txt">Table of n, a(n) for n = 1..75</a>

%e Some solutions for n=2

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

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

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

%Y Cf. A235765.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 15 2014