Number of -6..6 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)).
A202004
Number of -6..6 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) =169a(2) =231a(3) =4327a(4) =33699a(5) =511257a(6) =4460689a(7) =48525711a(8) =529141383a(9) =6524977447a(10) =74784050095a(11) =908188232827
External references
- oeis: A202004