Number of base 21 circular n-digit numbers with adjacent digits differing by 2 or less.
A124949
Number of base 21 circular n-digit numbers with adjacent digits differing by 2 or less.
Terms
- a(0) =1a(1) =21a(2) =99a(3) =369a(4) =1607a(5) =7051a(6) =31743a(7) =144683a(8) =666527a(9) =3094947a(10) =14463569a(11) =67946603a(12) =320593259a(13) =1518250599a(14) =7212838277a(15) =34360479199a(16) =164079145839a(17) =785173661987
External references
- oeis: A124949