Numbers k for which A335915(k), A335915(sigma(k)) and A335915(sigma(sigma(k))) obtain the same value.

A336464

Numbers k for which A335915(k), A335915(sigma(k)) and A335915(sigma(sigma(k))) obtain the same value.

Terms

    a(0) =1a(1) =2a(2) =28a(3) =56a(4) =60a(5) =84a(6) =160a(7) =168a(8) =528a(9) =12936a(10) =32760a(11) =102960a(12) =1097280a(13) =1778400a(14) =11740302a(15) =19183500a(16) =25241600a(17) =235855620a(18) =308308000a(19) =317167200a(20) =424305000a(21) =459818240a(22) =704700000a(23) =787200000a(24) =924924000a(25) =1592025435a(26) =2701416960a(27) =3812244480

External references