Numbers k such that sigma(k + sigma(k)) = sigma(k) + sigma(sigma(k)), where sigma = A000203.

A376831

Numbers k such that sigma(k + sigma(k)) = sigma(k) + sigma(sigma(k)), where sigma = A000203.

Terms

    a(0) =1986a(1) =58920a(2) =88092a(3) =111276a(4) =201588a(5) =662160a(6) =1103076a(7) =1573536a(8) =1671056a(9) =1887900a(10) =3172434a(11) =4507152a(12) =4575124a(13) =8105188a(14) =10971936a(15) =42273728a(16) =56886840

External references