Number of strings of n numbers x(i) in -5..5 with sums of x(i) and of x(i)*x(i+1) both zero.
A183940
Number of strings of n numbers x(i) in -5..5 with sums of x(i) and of x(i)*x(i+1) both zero.
Terms
- a(0) =1a(1) =1a(2) =11a(3) =39a(4) =497a(5) =2343a(6) =22881a(7) =177535a(8) =1682939a(9) =14821961a(10) =149400849a(11) =1447662427a(12) =14866001809a(13) =149548074379
External references
- oeis: A183940