Number of strings of n numbers x(i) in -7..7 with sums of x(i) and of x(i)*x(i+1) both zero.
A183942
Number of strings of n numbers x(i) in -7..7 with sums of x(i) and of x(i)*x(i+1) both zero.
Terms
- a(0) =1a(1) =1a(2) =15a(3) =57a(4) =1033a(5) =6259a(6) =80851a(7) =844829a(8) =10894795a(9) =130817901a(10) =1781556515a(11) =23640849007a(12) =329173058411
External references
- oeis: A183942