Number of (n+4)X1 arrays of occupancy after each element moves up to +-4 places but not 0 and without 2-loops.
A222162
Number of (n+4)X1 arrays of occupancy after each element moves up to +-4 places but not 0 and without 2-loops.
Terms
- a(0) =81a(1) =329a(2) =1216a(3) =4499a(4) =16750a(5) =62531a(6) =231973a(7) =855590a(8) =3147832a(9) =11573804a(10) =42548081a(11) =156375085a(12) =574525894a(13) =2110266004a(14) =7749866077a(15) =28458386767a(16) =104495519709
External references
- oeis: A222162