Number of length-(n+1) 0..3 arrays with new repeated values introduced in sequential order starting with zero.

A268256

Number of length-(n+1) 0..3 arrays with new repeated values introduced in sequential order starting with zero.

Terms

    a(0) =13a(1) =43a(2) =143a(3) =479a(4) =1616a(5) =5492a(6) =18804a(7) =64869a(8) =225483a(9) =789747a(10) =2787100a(11) =9910252a(12) =35501416a(13) =128109313a(14) =465606659a(15) =1704022367a(16) =6278399432a(17) =23282368196a(18) =86873186508a(19) =326055377709

External references