Number of length-(n+1) 0..n arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.
A268320
Number of length-(n+1) 0..n 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) =435a(6) =1829a(7) =8377a(8) =41504a(9) =220958a(10) =1256927a(11) =7602273a(12) =48676925a(13) =328685063a(14) =2332565079a(15) =17344752142a(16) =134774766541
External references
- oeis: A268320