Number of septenary sequences of length n such that no two consecutive terms have distance 1.
A287808
Number of septenary sequences of length n such that no two consecutive terms have distance 1.
Terms
- a(0) =1a(1) =7a(2) =37a(3) =197a(4) =1049a(5) =5587a(6) =29757a(7) =158491a(8) =844153a(9) =4496123a(10) =23947233a(11) =127547675a(12) =679344041a(13) =3618320227a(14) =19271886609a(15) =102645866251a(16) =546712113769
External references
- oeis: A287808