T(n,k)=Number of -k..k circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2)).
A202006
T(n,k)=Number of -k..k circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2)).
Terms
- a(0) =1a(1) =1a(2) =9a(3) =1a(4) =25a(5) =11a(6) =1a(7) =49a(8) =31a(9) =43a(10) =1a(11) =81a(12) =61a(13) =247a(14) =85a(15) =1a(16) =121a(17) =101a(18) =601a(19) =799a(20) =329a(21) =1a(22) =169a(23) =111a(24) =1357a(25) =2605a(26) =4281a(27) =577a(28) =1a(29) =225
External references
- oeis: A202006