Number of length-(n+1) 0..7 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.
A268326
Number of length-(n+1) 0..7 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) =8376a(8) =41466a(9) =220115a(10) =1242614a(11) =7395663a(12) =45999012a(13) =296480813a(14) =1965371333a(15) =13314182333a(16) =91697130971a(17) =639451012407
External references
- oeis: A268326