Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
A186475
Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
Terms
- a(0) =205a(1) =362a(2) =701a(3) =2049a(4) =3442a(5) =8223a(6) =14492a(7) =35081a(8) =64280a(9) =150785a(10) =281928a(11) =646756a(12) =1233097a(13) =2780008a(14) =5384887a(15) =11965960a(16) =23479960a(17) =51563275a(18) =102260008a(19) =222407905a(20) =444938056a(21) =960071644a(22) =1934442193a(23) =4147066744a(24) =8404992631a(25) =17923081288
External references
- oeis: A186475