Numbers k with the property that in the prime factorization of k all prime exponents are prime, their sum is also prime and equals the sum of distinct prime factors of k.

A071837

Numbers k with the property that in the prime factorization of k all prime exponents are prime, their sum is also prime and equals the sum of distinct prime factors of k.

Terms

    a(0) =4a(1) =27a(2) =72a(3) =108a(4) =800a(5) =3125a(6) =12500a(7) =247808a(8) =823543a(9) =22579200a(10) =37879808a(11) =190512000a(12) =266716800a(13) =428652000a(14) =529200000a(15) =600112800a(16) =868020300a(17) =1190700000a(18) =1234800000a(19) =1452124800a(20) =2420208000a(21) =2679075000a(22) =3267280800a(23) =3307500000a(24) =4984012800a(25) =6994132992a(26) =7351381800a(27) =7441875000a(28) =7717500000a(29) =9376762500

External references