Number of strings of n numbers x(i) in -3..3 with sums of x(i) and of x(i)*x(i+1) both zero.
A183938
Number of strings of n numbers x(i) in -3..3 with sums of x(i) and of x(i)*x(i+1) both zero.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =21a(4) =169a(5) =635a(6) =3803a(7) =19013a(8) =115755a(9) =642065a(10) =4138291a(11) =25416351a(12) =165975915a(13) =1053686983a(14) =6884578761a(15) =44272817075a(16) =290607235917
External references
- oeis: A183938