Number of base 21 n-digit numbers with adjacent digits differing by two or less.
A126408
Number of base 21 n-digit numbers with adjacent digits differing by two or less.
Terms
- a(0) =1a(1) =21a(2) =99a(3) =475a(4) =2293a(5) =11111a(6) =53973a(7) =262649a(8) =1279855a(9) =6243155a(10) =30479985a(11) =148910385a(12) =727918557a(13) =3559976043a(14) =17417455619a(15) =85244931269a(16) =417326666085
External references
- oeis: A126408