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A231443 Number of (n+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order 0

%I #4 Nov 09 2013 06:45:47

%S 2,15,340,33659,9796477,9081622778,23670993512633,180549324060008725,

%T 3898800271416067773477

%N Number of (n+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order

%C Diagonal of A231451

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 09 2013

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)