The lower left triangle of the ED1 array A167546.

Terms

a(0) =1a(1) =1a(2) =4a(3) =2a(4) =12a(5) =32a(6) =6a(7) =48a(8) =160a(9) =384a(10) =24a(11) =240a(12) =960a(13) =2688a(14) =6144a(15) =120a(16) =1440a(17) =6720a(18) =21504a(19) =55296a(20) =122880a(21) =720a(22) =10080a(23) =53760a(24) =193536a(25) =552960a(26) =1351680a(27) =2949120a(28) =5040a(29) =80640