Number of base 14 n-digit numbers with adjacent digits differing by one or less.

Terms

a(0) =1a(1) =14a(2) =40a(3) =116a(4) =338a(5) =988a(6) =2894a(7) =8490a(8) =24936a(9) =73308a(10) =215678a(11) =634942a(12) =1870220a(13) =5511218a(14) =16246924a(15) =47911604a(16) =141330980a(17) =417008740a(18) =1230695000a(19) =3632799810a(20) =10725265920a(21) =31669512054a(22) =93526269170a(23) =276234529396a(24) =815959178108