Least integer m > 0 with pi(m*n) = sigma(m+n), where pi(.) and sigma(.) are given by A000720 and A000203.

A247604

Least integer m > 0 with pi(m*n) = sigma(m+n), where pi(.) and sigma(.) are given by A000720 and A000203.

Terms

    a(0) =18a(1) =11a(2) =360a(3) =251a(4) =168a(5) =36a(6) =6a(7) =285a(8) =1185a(9) =792a(10) =29a(11) =11a(12) =245078a(13) =5a(14) =1869a(15) =46074a(16) =573a(17) =42863a(18) =11a(19) =5a(20) =8129a(21) =60806a(22) =1443a(23) =452a(24) =15a(25) =39298437a(26) =386891a(27) =1041920a(28) =1290489a(29) =17630

External references