Number of base-6 circular n-digit numbers with adjacent digits differing by 2 or less.

A124807

Number of base-6 circular n-digit numbers with adjacent digits differing by 2 or less.

Terms

    a(0) =1a(1) =6a(2) =24a(3) =84a(4) =332a(5) =1336a(6) =5478a(7) =22658a(8) =94196a(9) =392664a(10) =1639274a(11) =6849002a(12) =28627874a(13) =119688094a(14) =500456806a(15) =2092720174a(16) =8751273556a(17) =36596513060a(18) =153042707976a(19) =640011807436

External references