Smallest even numbers with strictly increasing number of preimages under the sum-of-proper-divisors function.

A283157

Smallest even numbers with strictly increasing number of preimages under the sum-of-proper-divisors function.

Terms

    a(0) =2a(1) =4a(2) =6a(3) =40a(4) =106a(5) =314a(6) =1954a(7) =2234a(8) =2794a(9) =11194a(10) =22394a(11) =58234a(12) =111994a(13) =160154a(14) =291194a(15) =425594a(16) =560554a(17) =1022554a(18) =1455994a(19) =1601594a(20) =3203194a(21) =11703994a(22) =16743994a(23) =21781754a(24) =24751994a(25) =53253194a(26) =60860794a(27) =79587194a(28) =95295194a(29) =181060874

External references