Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock summing to 3 4 5 6 7 8 or 9.
A251500
Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock summing to 3 4 5 6 7 8 or 9.
Terms
- a(0) =226a(1) =3250a(2) =46684a(3) =670690a(4) =9635410a(5) =138426508a(6) =1988695378a(7) =28570462642a(8) =410455690300
External references
- oeis: A251500