A229513 - OEIS

A229513

Number of n X n 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X (n+1) 0..2 array without adjacent equal elements in the latter.

%I #9 Apr 27 2021 21:00:11

%S 3,33,775,34151,3336437,701321971,329002027139,336641338602285,

%T 765068159631612145

%N Number of n X n 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X (n+1) 0..2 array without adjacent equal elements in the latter.

%C Diagonal of A229521.

%e Some solutions for n=3:

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

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

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

%Y Cf. A229521.

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 25 2013