Number of strings of length n over a 10-letter alphabet that begin with a nontrivial palindrome.
A249643
Number of strings of length n over a 10-letter alphabet that begin with a nontrivial palindrome.
Terms
- a(0) =0a(1) =0a(2) =10a(3) =190a(4) =1990a(5) =20710a(6) =207910a(7) =2087110a(8) =20879110a(9) =208870390a(10) =2088783190a(11) =20888623990a(12) =208887031990
External references
- oeis: A249643