Sequence lists numbers k > 1 such that k^4 == phi(k) (mod sigma(k)), where phi = A000010 and sigma = A000203.

A324216

Sequence lists numbers k > 1 such that k^4 == phi(k) (mod sigma(k)), where phi = A000010 and sigma = A000203.

Terms

    a(0) =2a(1) =76a(2) =782a(3) =1836a(4) =3996a(5) =26754a(6) =28896a(7) =51240a(8) =122598a(9) =130734a(10) =265524a(11) =306204a(12) =379350a(13) =450846a(14) =735012a(15) =1132740a(16) =1169472a(17) =2120160a(18) =2670974a(19) =4095080a(20) =4312440a(21) =4421088a(22) =8448120a(23) =8693640a(24) =9404160a(25) =10113966a(26) =10890978a(27) =12710304a(28) =12945312a(29) =15328872

External references