Numbers n such that sigma(n+1) - sigma(n) divides n.

Terms

a(0) =2a(1) =3a(2) =4a(3) =7a(4) =8a(5) =20a(6) =26a(7) =31a(8) =127a(9) =532a(10) =954a(11) =2186a(12) =2524a(13) =8191a(14) =104944a(15) =131071a(16) =524287a(17) =918080a(18) =1594322a(19) =10368512a(20) =26100416a(21) =2147483647a(22) =24708617408a(23) =25316030960a(24) =35053995440a(25) =45883878740