Half the number of length n integer sequences with sum zero and sum of squares 3698.

A157575

Half the number of length n integer sequences with sum zero and sum of squares 3698.

Terms

    a(0) =1a(1) =9a(2) =258a(3) =18070a(4) =1193265a(5) =71833671a(6) =4116288204a(7) =246535687044

External references