Number of nonnegative integer arrays of length n+4 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 4.
A211831
Number of nonnegative integer arrays of length n+4 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 4.
Terms
- a(0) =1a(1) =16a(2) =157a(3) =1254a(4) =9068a(5) =62617a(6) =426022a(7) =2913894a(8) =20307833a(9) =145503003a(10) =1077731960a(11) =8277491943a(12) =66003259942a(13) =546398875027
External references
- oeis: A211831