Number of base 20 n-digit numbers with adjacent digits differing by two or less.
A126407
Number of base 20 n-digit numbers with adjacent digits differing by two or less.
Terms
- a(0) =1a(1) =20a(2) =94a(3) =450a(4) =2168a(5) =10486a(6) =50848a(7) =247024a(8) =1201730a(9) =5852530a(10) =28526860a(11) =139144760a(12) =679090456a(13) =3315836420a(14) =16196773236a(15) =79141717426a(16) =386812618952
External references
- oeis: A126407