Where A098018(k)=-n.

Terms

a(0) =3a(1) =18a(2) =12a(3) =108a(4) =24a(5) =72a(6) =168a(7) =384a(8) =360a(9) =456a(10) =720a(11) =1824a(12) =1368a(13) =3192a(14) =19260a(15) =6840a(16) =13680a(17) =21000a(18) =80940a(19) =9576a(20) =50616a(21) =39120a(22) =220248a(23) =167808a(24) =264264a(25) =193800a(26) =242820a(27) =181944a(28) =117360a(29) =424080