Sum_{i=0..n} Sum_{j=0..i} a(j) * a(i-j) = (-11)^n.
A085457
Sum_{i=0..n} Sum_{j=0..i} a(j) * a(i-j) = (-11)^n.
Terms
- a(0) =1a(1) =-6a(2) =48a(3) =-438a(4) =4206a(5) =-41586a(6) =418980a(7) =-4277130a(8) =44089320a(9) =-457891170a(10) =4783741248a(11) =-50218890738a(12) =529300238574
External references
- oeis: A085457