A224650 - OEIS

%I #5 May 24 2024 15:43:27

%S 175616,209216,250304,303488,430208,630080,983168,1890368,3876992,

%T 8594432,21633920,56280896,151174016,425070656,1208783744,3475570688,

%U 10157902208,29817258560,87902960768,260802882368

%N Number of (n+2) X 9 0..1 matrices with each 3 X 3 subblock having the same population.

%C Column 7 of A224651.

%e Some solutions for n=2

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

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

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

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

%Y Cf. A224651.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 13 2013