Number of base 27 n-digit numbers with adjacent digits differing by one or less.

A126381

Number of base 27 n-digit numbers with adjacent digits differing by one or less.

Terms

    a(0) =1a(1) =27a(2) =79a(3) =233a(4) =689a(5) =2041a(6) =6053a(7) =17967a(8) =53367a(9) =158601a(10) =471557a(11) =1402579a(12) =4173131a(13) =12419951a(14) =36973123a(15) =110090201a(16) =327866769a(17) =976616073a(18) =2909516661a(19) =8669262243a(20) =25834637067a(21) =76997534979a(22) =229509874839a(23) =684183138261

External references