a(0)=a(1)=1, a(n) = least k > a(n-1) such that k*a(n-2) is an oblong number.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =10a(5) =12a(6) =21a(7) =35a(8) =36a(9) =70a(10) =112a(11) =117a(12) =230a(13) =368a(14) =390a(15) =759a(16) =763a(17) =1290a(18) =2244a(19) =2292a(20) =3133a(21) =3580a(22) =4170a(23) =5154a(24) =5355a(25) =7014a(26) =7710a(27) =9160a(28) =9328a(29) =11592