Numbers of words on alphabet {0,1,...,8} with no subwords ii, where i is from {0,1,2}.
A254657
Numbers of words on alphabet {0,1,...,8} with no subwords ii, where i is from {0,1,2}.
Terms
- a(0) =1a(1) =9a(2) =78a(3) =678a(4) =5892a(5) =51204a(6) =444984a(7) =3867096a(8) =33606672a(9) =292055952a(10) =2538087648a(11) =22057036896a(12) =191684821056
External references
- oeis: A254657