Positive integers n such that n=p+q for some primes p,q with pi(p)*pi(q) = sigma(n).

Terms

a(0) =92a(1) =130a(2) =132a(3) =136a(4) =154a(5) =270a(6) =286a(7) =384a(8) =398a(9) =456a(10) =546a(11) =608a(12) =630a(13) =636a(14) =702a(15) =934a(16) =944a(17) =2730a(18) =4394a(19) =4470a(20) =4556a(21) =5544a(22) =12084a(23) =14320a(24) =17572a(25) =22632a(26) =27808a(27) =27930a(28) =31150a(29) =31284