Number of length-(n+1) 0..5 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.
A268324
Number of length-(n+1) 0..5 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.
Terms
- a(0) =2a(1) =4a(2) =11a(3) =33a(4) =114a(5) =434a(6) =1806a(7) =8052a(8) =37851a(9) =184910a(10) =928406a(11) =4752055a(12) =24656385a(13) =129183323a(14) =681695654a(15) =3616896810a(16) =19273025959a(17) =103063766844a(18) =552827229141
External references
- oeis: A268324