Numbers k such that phi(k) = sigma(k) - sigma(k-1).

Terms

a(0) =574a(1) =3496a(2) =148708a(3) =380276a(4) =604504a(5) =703402a(6) =1223194a(7) =1961218a(8) =2375854a(9) =5153085a(10) =13182476a(11) =15089116a(12) =15624820a(13) =18503524a(14) =19402515a(15) =22352968a(16) =27366118a(17) =41377798a(18) =42917332a(19) =51062116a(20) =58911736a(21) =60113914a(22) =74657636a(23) =75018856