Number of length-(n+1) 0..4 arrays with new repeated values introduced in sequential order starting with zero.
A268257
Number of length-(n+1) 0..4 arrays with new repeated values introduced in sequential order starting with zero.
Terms
- a(0) =21a(1) =89a(2) =378a(3) =1610a(4) =6877a(5) =29461a(6) =126591a(7) =545627a(8) =2359152a(9) =10233188a(10) =44533546a(11) =194450722a(12) =851923695a(13) =3745257911a(14) =16522347429a(15) =73145533817a(16) =324971178262
External references
- oeis: A268257