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A254768 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0

%I #4 Feb 07 2015 14:23:20

%S 512,11321,295516,14533460,1209604111,208503958572,66029963150922,

%T 36926711851435570,39182636472055684103,75157581979007926362907,

%U 260790701639951359653998352

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

%C Diagonal of A254775

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 07 2015

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Last modified April 23 12:27 EDT 2024. Contains 371912 sequences. (Running on oeis4.)