Number of base 21 circular n-digit numbers with adjacent digits differing by 9 or less.
A125478
Number of base 21 circular n-digit numbers with adjacent digits differing by 9 or less.
Terms
- a(0) =1a(1) =21a(2) =309a(3) =3981a(4) =58209a(5) =868821a(6) =13158381a(7) =200564553a(8) =3066826521a(9) =46965700983a(10) =719758889369
External references
- oeis: A125478