Number of strings of n numbers x(i) in -6..6 with sums of x(i) and of x(i)*x(i+1) both zero.
A183941
Number of strings of n numbers x(i) in -6..6 with sums of x(i) and of x(i)*x(i+1) both zero.
Terms
- a(0) =1a(1) =1a(2) =13a(3) =51a(4) =761a(5) =4411a(6) =47675a(7) =442337a(8) =4838487a(9) =50772785a(10) =584627697a(11) =6723246423a(12) =79912390369a(13) =950827647493
External references
- oeis: A183941