Number of unordered factorizations of n! into two distinct proper factors.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =14a(5) =29a(6) =47a(7) =79a(8) =134a(9) =269a(10) =395a(11) =791a(12) =1295a(13) =2015a(14) =2687a(15) =5375a(16) =7343a(17) =14687a(18) =20519a(19) =30399a(20) =47999a(21) =95999a(22) =121439a(23) =170015a(24) =266111a(25) =338687a(26) =458639a(27) =917279a(28) =1166399a(29) =2332799