Number of (n+1)X2 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors.
A205048
Number of (n+1)X2 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors.
Terms
- a(0) =81a(1) =243a(2) =803a(3) =2892a(4) =10948a(5) =43261a(6) =174282a(7) =709813a(8) =2904299a(9) =11912535a(10) =48917149a(11) =200991165a(12) =826074359a(13) =3395693794a(14) =13959599701a(15) =57390029458a(16) =235944613954a(17) =970038942121
External references
- oeis: A205048