Prime power perfect numbers: If n = Product p_i^r_i let PPsigma(n) = Product {Sum p_i^s_i, 2<=s_i<=r_i, s_i is prime}; sequence gives numbers k such that PPsigma(k) = 2*k.
A096290
Prime power perfect numbers: If n = Product p_i^r_i let PPsigma(n) = Product {Sum p_i^s_i, 2<=s_i<=r_i, s_i is prime}; sequence gives numbers k such that PPsigma(k) = 2*k.
Terms
- a(0) =216a(1) =5400a(2) =10584a(3) =26136a(4) =36504a(5) =62424a(6) =77976a(7) =114264a(8) =181656a(9) =207576a(10) =264600a(11) =295704a(12) =363096a(13) =399384a(14) =477144a(15) =606744a(16) =653400a(17) =751896a(18) =803736a(19) =912600a(20) =969624a(21) =1088856a(22) =1149984a(23) =1151064a(24) =1280664a(25) =1348056a(26) =1488024a(27) =1560600a(28) =1710936a(29) =1788696
External references
- oeis: A096290