Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements unequal but differing by no more than 4.
A205337
Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements unequal but differing by no more than 4.
Terms
- a(0) =0a(1) =4a(2) =12a(3) =82a(4) =454a(5) =2912a(6) =18652a(7) =124299a(8) =841400a(9) =5800725a(10) =40506816a(11) =286137616a(12) =2040430976a(13) =14670243774a(14) =106225269954a(15) =773958961125
External references
- oeis: A205337