Numbers n such that the sum_i (d_i^i) of the i-th powers of their sorted divisors d_1< d_2<...< n is prime.

A180852

Numbers n such that the sum_i (d_i^i) of the i-th powers of their sorted divisors d_1< d_2<...< n is prime.

Terms

    a(0) =2a(1) =9a(2) =18a(3) =5618a(4) =7744a(5) =10000a(6) =28561a(7) =30258a(8) =34322a(9) =40000a(10) =46225a(11) =165649a(12) =200978a(13) =249218a(14) =258064a(15) =310472a(16) =370881a(17) =393129a(18) =425042a(19) =438244a(20) =542882a(21) =595984a(22) =865928a(23) =916658a(24) =971618a(25) =1932578a(26) =2477476a(27) =2558322a(28) =3367225a(29) =3737378

External references