Number of length n sequences on alphabet {0,1,2} that contain all of 00, 01, 02, 10, 11, 12, 20, 21, 22 as (possibly overlapping) contiguous subsequences.
A243862
Number of length n sequences on alphabet {0,1,2} that contain all of 00, 01, 02, 10, 11, 12, 20, 21, 22 as (possibly overlapping) contiguous subsequences.
Terms
- a(0) =216a(1) =2160a(2) =14544a(3) =78840a(4) =374568a(5) =1623420a(6) =6580848a(7) =25350384a(8) =93835368a(9) =336429336a(10) =1175333232a(11) =4019312448a(12) =13502627088a(13) =44688347724a(14) =146041135932a(15) =472142876544
External references
- oeis: A243862