Number of -5..5 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero.
A200427
Number of -5..5 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero.
Terms
- a(0) =520a(1) =4750a(2) =36952a(3) =293464a(4) =2591502a(5) =23380862a(6) =210222830a(7) =1882624856a(8) =16911040968a(9) =152565274262
External references
- oeis: A200427