Number of length 7+5 0..n arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four.
A249240
Number of length 7+5 0..n arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four.
Terms
- a(0) =422a(1) =31104a(2) =1365524a(3) =19188990a(4) =171561694a(5) =1195936390a(6) =6483080144a(7) =28086995286a(8) =111475346884a(9) =380335170960
External references
- oeis: A249240