T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2.
A217227
T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =7a(8) =7a(9) =0a(10) =0a(11) =38a(12) =112a(13) =38a(14) =0a(15) =0a(16) =190a(17) =1648a(18) =1648a(19) =190a(20) =0a(21) =0a(22) =918a(23) =22914a(24) =67956a(25) =22914a(26) =918a(27) =0a(28) =0a(29) =4367
External references
- oeis: A217227