Prime power Giuga numbers: composite numbers n > 1 such that -1/n + sum 1/p^k = 1, where the sum is over the prime powers p^k dividing n.

A286497

Prime power Giuga numbers: composite numbers n > 1 such that -1/n + sum 1/p^k = 1, where the sum is over the prime powers p^k dividing n.

Terms

    a(0) =12a(1) =30a(2) =56a(3) =306a(4) =380a(5) =858a(6) =992a(7) =1722a(8) =2552a(9) =2862a(10) =16256a(11) =30704a(12) =66198a(13) =73712a(14) =86142a(15) =249500a(16) =629802a(17) =1703872a(18) =6127552a(19) =16191736a(20) =19127502a(21) =35359900a(22) =67100672a(23) =101999900a(24) =172173762a(25) =182552538a(26) =266677578a(27) =575688042a(28) =1180712682a(29) =2214408306

External references