Numbers for which the harmonic mean of nontrivial divisors is an integer and which are not a square of prime numbers.

A247079

Numbers for which the harmonic mean of nontrivial divisors is an integer and which are not a square of prime numbers.

Terms

    a(0) =345a(1) =1050a(2) =1645a(3) =4386a(4) =6489a(5) =8041a(6) =13026a(7) =23881a(8) =88473a(9) =115957a(10) =255041a(11) =342637a(12) =377201a(13) =1497517a(14) =2132021a(15) =2428489a(16) =3256261a(17) =3847001a(18) =4114285a(19) =4646101a(20) =5054221a(21) =6816865a(22) =7218641a(23) =7587901a(24) =13384681a(25) =14872837a(26) =17897737a(27) =20901553a(28) =23807821a(29) =25863653

External references