904294268domain: NAppears in sequencesNumber of (n+1)X2 0..3 arrays with permanents of 2X2 subblocks differing from horizontal and vertical neighbor permanents.at n=6A205033T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with permanents of 2X2 subblocks differing from horizontal and vertical neighbor permanents.at n=21A205037