A125330 Number of base 20 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 20, 128, 656, 3928, 23840, 148304, 934968, 5958552, 38285216, 247607348, 1609914524, 10513615792, 68913452056, 453123210178, 2987405569166, 19741419610536, 130718419293680, 867078544410362, 5760352822741182

Offset: 0

Author

R. H. Hardin, Dec 28 2006

Keywords

• nonn
• base

Comments

[Empirical] a(base,n)=a(base-1,n)+A025012(n+1) for base>=3.int(n/2)+1

Links

• OEIS Wiki, Number of base k circular n-digit numbers with adjacent digits differing by d or less