Numbers n such that sigma(n+1) - sigma(n) = k*n for some integer k, where sigma(n) = A000203 (sum of divisors of n).

A223136

Numbers n such that sigma(n+1) - sigma(n) = k*n for some integer k, where sigma(n) = A000203 (sum of divisors of n).

Terms

    a(0) =1a(1) =3a(2) =7a(3) =14a(4) =31a(5) =127a(6) =206a(7) =532a(8) =954a(9) =957a(10) =1334a(11) =1364a(12) =1634a(13) =2685a(14) =2974a(15) =4364a(16) =8191a(17) =14841a(18) =18873a(19) =19358a(20) =20145a(21) =24957a(22) =33998a(23) =36566a(24) =42818a(25) =56564a(26) =64665a(27) =74918a(28) =79826a(29) =79833

External references