Numbers of the form m = p1 * p2 * p3 * p4 where for each d|m we have (d+m/d)/2 prime and p1 < p2 < p3 < p4 each prime.

A128285

Numbers of the form m = p1 * p2 * p3 * p4 where for each d|m we have (d+m/d)/2 prime and p1 < p2 < p3 < p4 each prime.

Terms

    a(0) =1365a(1) =4305a(2) =10465a(3) =11685a(4) =15873a(5) =27105a(6) =31845a(7) =35245a(8) =50065a(9) =54033a(10) =58765a(11) =74965a(12) =84513a(13) =91977a(14) =95557a(15) =95613a(16) =96033a(17) =104377a(18) =113997a(19) =114405a(20) =117957a(21) =118105a(22) =126357a(23) =127605a(24) =136437a(25) =170905a(26) =197985a(27) =209605a(28) =215373a(29) =226185

External references