Perfect powers (m^k where m is an integer and k >= 2) multiplied by -1 when m is prime for largest k (m^k thus a prime power).

A157985

Perfect powers (m^k where m is an integer and k >= 2) multiplied by -1 when m is prime for largest k (m^k thus a prime power).

Terms

    a(0) =1a(1) =-4a(2) =-8a(3) =-9a(4) =-16a(5) =-25a(6) =-27a(7) =-32a(8) =36a(9) =-49a(10) =-64a(11) =-81a(12) =100a(13) =-121a(14) =-125a(15) =-128a(16) =144a(17) =-169a(18) =196a(19) =216a(20) =225a(21) =-243a(22) =-256a(23) =-289a(24) =324a(25) =-343a(26) =-361a(27) =400a(28) =441a(29) =484

External references