7093125423domain: NAppears in sequencesNumber of (n+1)X4 0..2 arrays with each element of every 2X2 subblock being the sum mod 3 of two others.at n=7A183830Number of (n+1)X9 0..2 arrays with each element of every 2X2 subblock being the sum mod 3 of two others.at n=2A183835