Intersection of A025487 and A026477.

Terms

a(0) =1a(1) =2a(2) =4a(3) =16a(4) =120a(5) =210a(6) =216a(7) =256a(8) =384a(9) =2880a(10) =6300a(11) =7200a(12) =15360a(13) =15552a(14) =26880a(15) =27648a(16) =32768a(17) =49152a(18) =73728a(19) =83160a(20) =120120a(21) =189000a(22) =510510a(23) =921600a(24) =1399680a(25) =1966080a(26) =2365440a(27) =2822400a(28) =2985984a(29) =3440640