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A187676 T(n,k) = Number of (n+2) X (k+2) 0..3 arrays with no 2 X 2 subblock sum equal to any diagonal or antidiagonal neighbor 2 X 2 subblock sum. 3

%I

%S 192960,9136352,9136352,433713824,1292583020,433713824,20581985952,

%T 184351404608,184351404608,20581985952,976666568320,26257519475028,

%U 79410378172576,26257519475028,976666568320,46345923682624

%N T(n,k) = Number of (n+2) X (k+2) 0..3 arrays with no 2 X 2 subblock sum equal to any diagonal or antidiagonal neighbor 2 X 2 subblock sum.

%C Table starts

%C .........192960..........9136352.........433713824.......20581985952

%C ........9136352.......1292583020......184351404608....26257519475028

%C ......433713824.....184351404608....79410378172576.34116783462382978

%C ....20581985952...26257519475028.34116783462382978

%C ...976666568320.3739210796619416

%C .46345923682624

%H R. H. Hardin, <a href="/A187676/b187676.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for 5 X 4

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

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

%e ..2..2..0..2....0..2..0..2....0..2..0..2....2..2..0..2....0..2..0..1

%e ..1..1..3..3....0..2..3..0....1..1..0..2....1..1..0..1....0..3..3..1

%e ..0..0..1..0....1..1..2..0....3..3..2..3....3..0..1..2....1..2..2..1

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Mar 12 2011

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Last modified May 24 18:27 EDT 2022. Contains 354043 sequences. (Running on oeis4.)