Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum one and no antidiagonal sum two.

A254847

Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum one and no antidiagonal sum two.

Terms

    a(0) =192a(1) =576a(2) =1632a(3) =4624a(4) =13328a(5) =38416a(6) =110544a(7) =318096a(8) =913680a(9) =2624400a(10) =7549200a(11) =21715600a(12) =62425360a(13) =179452816a(14) =515960336a(15) =1483482256a(16) =4265261840a(17) =12263347600a(18) =35258287120a(19) =101370918544a(20) =291456195856a(21) =837979129744

External references