Numbers m such that m = sigma(abs(k)) - 3k, where k = sigma(m) - 3m.

A069146

Numbers m such that m = sigma(abs(k)) - 3k, where k = sigma(m) - 3m.

Terms

    a(0) =1248a(1) =1596a(2) =28272a(3) =30240a(4) =32760a(5) =463296a(6) =2178540a(7) =12865770a(8) =23569920a(9) =30998250a(10) =45532800a(11) =142990848a(12) =1379454720a(13) =1912369152a(14) =2623977450a(15) =43861478400a(16) =66433720320a(17) =153003540480a(18) =403031236608a(19) =489622536192a(20) =704575228896

External references