Numbers k such that k! is the product of exactly four smaller factorials.

Terms

a(0) =8a(1) =9a(2) =24a(3) =72a(4) =96a(5) =216a(6) =288a(7) =480a(8) =864a(9) =1152a(10) =1440a(11) =2880a(12) =3456a(13) =4320a(14) =5760a(15) =8640a(16) =13824a(17) =17280a(18) =20160a(19) =25920a(20) =28800a(21) =34560a(22) =60480a(23) =69120a(24) =86400