Number of (n+1) X (2+1) 0..3 arrays with every 2 X 2 subblock summing to 3 6 or 9.
A251294
Number of (n+1) X (2+1) 0..3 arrays with every 2 X 2 subblock summing to 3 6 or 9.
Terms
- a(0) =444a(1) =3140a(2) =22536a(3) =164480a(4) =1221748a(5) =9240612a(6) =71163896a(7) =557726448a(8) =4443661924a(9) =35942893556a(10) =294664492808
External references
- oeis: A251294