Orders of non-Abelian simple groups of rank at least four.

Terms

a(0) =60a(1) =360a(2) =2520a(3) =7920a(4) =20160a(5) =95040a(6) =175560a(7) =181440a(8) =443520a(9) =604800a(10) =1814400a(11) =9999360a(12) =10200960a(13) =13685760a(14) =17971200a(15) =19958400a(16) =44352000a(17) =50232960a(18) =174182400a(19) =197406720a(20) =211341312a(21) =239500800a(22) =244823040a(23) =898128000