Number of base 16 n-digit numbers with adjacent digits differing by one or less.

A126370

Number of base 16 n-digit numbers with adjacent digits differing by one or less.

Terms

    a(0) =1a(1) =16a(2) =46a(3) =134a(4) =392a(5) =1150a(6) =3380a(7) =9948a(8) =29310a(9) =86430a(10) =255044a(11) =753040a(12) =2224514a(13) =6574100a(14) =19435570a(15) =57477542a(16) =170028792a(17) =503102142a(18) =1488974870a(19) =4407636908a(20) =13049761478a(21) =38642911632a(22) =114446028208a(23) =338991739166

External references