Number of 0..6 arrays of length n with each element unequal to at least one neighbor, starting with 0.
A221461
Number of 0..6 arrays of length n with each element unequal to at least one neighbor, starting with 0.
Terms
- a(0) =0a(1) =6a(2) =36a(3) =252a(4) =1728a(5) =11880a(6) =81648a(7) =561168a(8) =3856896a(9) =26508384a(10) =182191680a(11) =1252200384a(12) =8606352384a(13) =59151316608a(14) =406546013952
External references
- oeis: A221461