One quarter the number of nX3 1..4 arrays with no two neighbors of any element equal to each other.
A183355
One quarter the number of nX3 1..4 arrays with no two neighbors of any element equal to each other.
Terms
- a(0) =12a(1) =144a(2) =432a(3) =1296a(4) =3888a(5) =11664a(6) =34992a(7) =104976a(8) =314928a(9) =944784a(10) =2834352a(11) =8503056a(12) =25509168a(13) =76527504a(14) =229582512a(15) =688747536a(16) =2066242608a(17) =6198727824a(18) =18596183472a(19) =55788550416a(20) =167365651248a(21) =502096953744
External references
- oeis: A183355