Number of nX4 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
A221384
Number of nX4 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
Terms
- a(0) =0a(1) =7a(2) =94a(3) =1198a(4) =15181a(5) =191832a(6) =2420113a(7) =30504742a(8) =384323166a(9) =4840824840a(10) =60965809190a(11) =767757426068
External references
- oeis: A221384