Number of palindromic n-ary words of length n that include the last letter of their respective alphabet.
A378203
Number of palindromic n-ary words of length n that include the last letter of their respective alphabet.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =7a(5) =61a(6) =91a(7) =1105a(8) =1695a(9) =26281a(10) =40951a(11) =771561a(12) =1214423a(13) =26916709a(14) =42664987a(15) =1087101569a(16) =1732076671a(17) =49868399761a(18) =79771413871
External references
- oeis: A378203