Primes of the form sigma(m^2) where m is a composite number ordered by values m.

Terms

a(0) =31a(1) =127a(2) =1093a(3) =2801a(4) =8191a(5) =19531a(6) =30941a(7) =131071a(8) =88741a(9) =524287a(10) =292561a(11) =797161a(12) =732541a(13) =3500201a(14) =5229043a(15) =12207031a(16) =25646167a(17) =28792661a(18) =39449441a(19) =48037081a(20) =305175781a(21) =262209281a(22) =917087137a(23) =2147483647a(24) =1394714501a(25) =2666986681