Composite numbers k such that A003958(k) divides k-1.

Terms

a(0) =4a(1) =8a(2) =9a(3) =16a(4) =32a(5) =64a(6) =81a(7) =128a(8) =256a(9) =512a(10) =1024a(11) =2048a(12) =4096a(13) =8192a(14) =16384a(15) =32768a(16) =65536a(17) =131072a(18) =180225a(19) =262144a(20) =524288a(21) =1048576a(22) =2097152a(23) =4194304a(24) =8388608a(25) =16777216a(26) =33554432a(27) =67108864a(28) =134217728a(29) =268435456