Numbers k such that k/A000005(k) is a square.

Terms

a(0) =1a(1) =2a(2) =36a(3) =108a(4) =128a(5) =225a(6) =288a(7) =441a(8) =450a(9) =600a(10) =864a(11) =882a(12) =1089a(13) =1176a(14) =1521a(15) =1944a(16) =2000a(17) =2178a(18) =2601a(19) =2904a(20) =3042a(21) =3240a(22) =3249a(23) =4056a(24) =4761a(25) =5202a(26) =6144a(27) =6498a(28) =6561a(29) =6936