Number of -n..n circular arrays x(0..4) of 5 elements with zero sums of x(i) and x(i)*x((i+1) mod 5).

A202007

Number of -n..n circular arrays x(0..4) of 5 elements with zero sums of x(i) and x(i)*x((i+1) mod 5).

Terms

    a(0) =11a(1) =31a(2) =61a(3) =101a(4) =111a(5) =231a(6) =261a(7) =361a(8) =431a(9) =491a(10) =541a(11) =801a(12) =851a(13) =931a(14) =1081a(15) =1321a(16) =1391a(17) =1671a(18) =1761a(19) =1981a(20) =2131a(21) =2311a(22) =2381a(23) =2921a(24) =3051a(25) =3291a(26) =3441a(27) =3761a(28) =3871a(29) =4411

External references