A variant of A322827.

Terms

a(0) =1a(1) =2a(2) =6a(3) =4a(4) =36a(5) =30a(6) =18a(7) =8a(8) =216a(9) =450a(10) =210a(11) =900a(12) =108a(13) =150a(14) =54a(15) =16a(16) =1296a(17) =6750a(18) =7350a(19) =13500a(20) =44100a(21) =2310a(22) =22050a(23) =27000a(24) =648a(25) =2250a(26) =1470a(27) =4500a(28) =324a(29) =750