Number of -4..4 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)).
A202002
Number of -4..4 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) =81a(2) =101a(3) =1357a(4) =7463a(5) =80065a(6) =490879a(7) =3697331a(8) =28156261a(9) =240962805a(10) =1907124597a(11) =16026836953a(12) =133898693111
External references
- oeis: A202002