Number of (n+2)X4 0..2 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

A187281

Number of (n+2)X4 0..2 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

Terms

    a(0) =859a(1) =5385a(2) =71745a(3) =704041a(4) =8256093a(5) =90158141a(6) =1023183069a(7) =11390667717a(8) =128572706665

External references