Numbers n such that sigma(n+4) - sigma(n) = n + 4.
A246854
Numbers n such that sigma(n+4) - sigma(n) = n + 4.
Terms
- a(0) =1a(1) =4a(2) =26a(3) =122a(4) =146a(5) =458a(6) =746a(7) =3746a(8) =47612a(9) =16065500a(10) =388978292a(11) =5313509288a(12) =64278616556
External references
- oeis: A246854