Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements unequal but differing by no more than 3.
A205336
Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements unequal but differing by no more than 3.
Terms
- a(0) =0a(1) =3a(2) =6a(3) =35a(4) =138a(5) =689a(6) =3272a(7) =16522a(8) =83792a(9) =434749a(10) =2278888a(11) =12093271a(12) =64741330a(13) =349470487a(14) =1899418046a(15) =10387322922a(16) =57111322368a(17) =315523027610
External references
- oeis: A205336