Numbers k such that Sum_{j} p_j = Sum_{j} e_j where Product_{j} p_j^(e_j) is the prime factorization of k.

A054411

Numbers k such that Sum_{j} p_j = Sum_{j} e_j where Product_{j} p_j^(e_j) is the prime factorization of k.

Terms

    a(0) =1a(1) =4a(2) =27a(3) =48a(4) =72a(5) =108a(6) =162a(7) =320a(8) =800a(9) =1792a(10) =2000a(11) =3125a(12) =3840a(13) =5000a(14) =5760a(15) =6272a(16) =8640a(17) =9600a(18) =10935a(19) =12500a(20) =12960a(21) =14400a(22) =18225a(23) =19440a(24) =21504a(25) =21600a(26) =21952a(27) =24000a(28) =29160a(29) =30375

External references