Primitive elements of A065607.

Terms

a(0) =20a(1) =156a(2) =255a(3) =609a(4) =1295a(5) =2385a(6) =4015a(7) =4095a(8) =6545a(9) =6984a(10) =9919a(11) =9999a(12) =12656a(13) =14385a(14) =14625a(15) =20724a(16) =20735a(17) =28545a(18) =32424a(19) =37791a(20) =38335a(21) =38415a(22) =48464a(23) =50369a(24) =50609a(25) =64911a(26) =65455a(27) =69804a(28) =82225a(29) =83265