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A229431 Number of n X n 0..6 arrays of the sum 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.

%I A229431 #7 Jul 23 2025 05:44:40
%S A229431 7,1213,2985887,74760946845,15371734909895599,26247877098036804502973
%N A229431 Number of n X n 0..6 arrays of the sum 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.
%C A229431 Diagonal of A229437
%e A229431 Some solutions for n=2
%e A229431 ..4..0....3..2....1..2....3..0....3..4....5..3....0..2....4..3....1..4....3..2
%e A229431 ..3..0....4..1....0..2....4..4....5..6....2..3....1..3....0..0....5..6....5..4
%K A229431 nonn
%O A229431 1,1
%A A229431 _R. H. Hardin_ Sep 23 2013