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

A126364

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

Terms

    a(0) =10a(1) =28a(2) =80a(3) =230a(4) =664a(5) =1922a(6) =5574a(7) =16188a(8) =47064a(9) =136946a(10) =398746a(11) =1161634a(12) =3385486a(13) =9869934a(14) =28781908a(15) =83948652a(16) =244894048a(17) =714493794a(18) =2084792450a(19) =6083620812a(20) =17753709802a(21) =51812911858a(22) =151218254846a(23) =441351052720

External references