Number of (n+3) X 1 arrays of occupancy after each element moves up to +-n places including 0.
A222347
Number of (n+3) X 1 arrays of occupancy after each element moves up to +-n places including 0.
Terms
- a(0) =21a(1) =108a(2) =440a(3) =1690a(4) =6405a(5) =24276a(6) =92340a(7) =352674a(8) =1352032
External references
- oeis: A222347