Oblong numbers that are products of smaller oblong numbers.

Terms

a(0) =12a(1) =72a(2) =240a(3) =420a(4) =600a(5) =1056a(6) =1260a(7) =2352a(8) =4032a(9) =6480a(10) =7140a(11) =9120a(12) =9900a(13) =10920a(14) =14280a(15) =14520a(16) =18360a(17) =20592a(18) =20880a(19) =28392a(20) =38220a(21) =46872a(22) =50400a(23) =65280a(24) =78120a(25) =82656a(26) =83232a(27) =104652a(28) =123552a(29) =129960