Number of n X 1 0..6 arrays with values 0..6 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.
A198648
Number of n X 1 0..6 arrays with values 0..6 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =11a(7) =23a(8) =47a(9) =103a(10) =226a(11) =518a(12) =1200a(13) =2867a(14) =6946a(15) =17233a(16) =43385a(17) =111354a(18) =289861a(19) =766767a(20) =2054605a(21) =5579891a(22) =15325432a(23) =42559486a(24) =119312586a(25) =337469019a(26) =961850000a(27) =2760643085a(28) =7971239103a(29) =23140321458
External references
- oeis: A198648