A125357 Number of base 20 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 20, 160, 1040, 7880, 60720, 479296, 3835544, 31025864, 253006376, 2076361620, 17126818652, 141850168856, 1178779027316, 9822495145882, 82032520847910, 686360207228280, 5751457669257720, 48255474860875126, 405286028562477798

Offset: 0

Author

R. H. Hardin, Dec 28 2006

Keywords

• nonn
• base

Comments

[Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1

Links

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