Number of base 18 n-digit numbers with adjacent digits differing by one or less.

A126372

Number of base 18 n-digit numbers with adjacent digits differing by one or less.

Terms

    a(0) =1a(1) =18a(2) =52a(3) =152a(4) =446a(5) =1312a(6) =3866a(7) =11406a(8) =33684a(9) =99552a(10) =294410a(11) =871138a(12) =2578808a(13) =7636982a(14) =22624216a(15) =67043480a(16) =198726606a(17) =589195584a(18) =1747255194a(19) =5182477842a(20) =15374283866a(21) =45616475418a(22) =135366696658a(23) =401753608184

External references