Composites of form prime-1 containing a record number of prime factors.

Terms

a(0) =4a(1) =12a(2) =16a(3) =72a(4) =96a(5) =192a(6) =256a(7) =768a(8) =3456a(9) =7680a(10) =12288a(11) =40960a(12) =65536a(13) =737280a(14) =786432a(15) =5308416a(16) =7340032a(17) =14155776a(18) =28311552a(19) =104857600a(20) =113246208a(21) =167772160a(22) =469762048a(23) =1811939328a(24) =3221225472a(25) =24159191040a(26) =75161927680a(27) =77309411328