a(n) is the least index k such that the n-th odd squarefree number A056911(n) divides A110566(k).

Terms

a(0) =1a(1) =6a(2) =20a(3) =42a(4) =33a(5) =156a(6) =20a(7) =272a(8) =342a(9) =2058a(10) =506a(11) =377a(12) =930a(13) =77a(14) =14406a(15) =629a(16) =162a(17) =1640a(18) =559a(19) =2162a(20) =4624a(21) =1166a(22) =110a(23) =6498a(24) =3422a(25) =610a(26) =342732a(27) =4422a(28) =506a(29) =4970