Numbers k such that A030787(k)=4.

Terms

a(0) =1a(1) =8a(2) =25a(3) =32a(4) =53a(5) =81a(6) =84a(7) =99a(8) =101a(9) =116a(10) =136a(11) =186a(12) =249a(13) =283a(14) =358a(15) =392a(16) =436a(17) =485a(18) =490a(19) =494a(20) =536a(21) =544a(22) =546a(23) =589a(24) =593a(25) =650a(26) =704a(27) =709a(28) =717a(29) =768