Numbers n such that sigma(sigma*(n)) = sigma*(sigma(n)), where sigma*(n) is the sum of anti-divisors of n (A066417).

A230373

Numbers n such that sigma(sigma*(n)) = sigma*(sigma(n)), where sigma*(n) is the sum of anti-divisors of n (A066417).

Terms

    a(0) =3a(1) =265a(2) =450a(3) =1989a(4) =18278a(5) =31639a(6) =55474a(7) =71306a(8) =96639a(9) =197518a(10) =267026a(11) =1620723a(12) =1888235a(13) =3605481a(14) =4448715a(15) =10837215a(16) =12128451a(17) =22598820a(18) =84681074a(19) =96503379a(20) =130118331a(21) =152234714a(22) =162138375a(23) =189149834a(24) =211239421a(25) =343379954a(26) =353833749a(27) =404994939a(28) =599244123a(29) =804486314

External references