Table read by upward antidiagonals: T(n,k) is the number of strings of length k over an n-letter alphabet that begin with a palindrome of two or more letters; n, k >= 1.
A342237
Table read by upward antidiagonals: T(n,k) is the number of strings of length k over an n-letter alphabet that begin with a palindrome of two or more letters; n, k >= 1.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =3a(8) =6a(9) =1a(10) =0a(11) =4a(12) =15a(13) =14a(14) =1a(15) =0a(16) =5a(17) =28a(18) =51a(19) =30a(20) =1a(21) =0a(22) =6a(23) =45a(24) =124a(25) =165a(26) =62a(27) =1a(28) =0a(29) =7
External references
- oeis: A342237