Number of base 10 circular n-digit numbers with adjacent digits differing by 1 or less.

A124703

Number of base 10 circular n-digit numbers with adjacent digits differing by 1 or less.

Terms

    a(0) =1a(1) =10a(2) =28a(3) =64a(4) =168a(5) =440a(6) =1186a(7) =3230a(8) =8896a(9) =24688a(10) =68958a(11) =193610a(12) =545958a(13) =1545190a(14) =4387012a(15) =12489224a(16) =35639536a(17) =101914160a(18) =291970654a(19) =837834650a(20) =2407780858a(21) =6928681418a(22) =19961961014a(23) =57573920446a(24) =166216938550a(25) =480300958390

External references