Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221930
Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =1a(1) =25a(2) =232a(3) =2197a(4) =20933a(5) =198589a(6) =1885324a(7) =17896442a(8) =169874679a(9) =1612469540a(10) =15305706000a(11) =145283086944
External references
- oeis: A221930