Odd numbers n such that b(n) >= n and b(b(n)) >= n, where b(n) = A161942(n) = oddpart(sigma(n)).

A162284

Odd numbers n such that b(n) >= n and b(b(n)) >= n, where b(n) = A161942(n) = oddpart(sigma(n)).

Terms

    a(0) =1a(1) =81a(2) =18966025a(3) =135187129a(4) =164275489a(5) =350561925a(6) =445421025a(7) =598047025a(8) =649587169a(9) =748733769a(10) =850830561a(11) =960362325a(12) =1055925025a(13) =1341097641a(14) =1406175001a(15) =1476326929a(16) =1520766009a(17) =1536248025a(18) =1591004025a(19) =1735566525

External references