Composite numbers whose sum of proper divisors is a power of 2.

Terms

a(0) =9a(1) =10a(2) =12a(3) =26a(4) =49a(5) =56a(6) =58a(7) =76a(8) =122a(9) =332a(10) =568a(11) =961a(12) =992a(13) =1018a(14) =2042a(15) =3344a(16) =4336a(17) =8186a(18) =16129a(19) =16256a(20) =32762a(21) =37432a(22) =82704a(23) =227744a(24) =266176a(25) =269072a(26) =299576a(27) =856544a(28) =2097146a(29) =5385812