A001263 * A127773.

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =9a(5) =6a(6) =1a(7) =18a(8) =36a(9) =10a(10) =1a(11) =30a(12) =120a(13) =100a(14) =15a(15) =1a(16) =45a(17) =300a(18) =500a(19) =225a(20) =21a(21) =1a(22) =63a(23) =630a(24) =1750a(25) =1575a(26) =441a(27) =28a(28) =1a(29) =84