Number of ways to write n! as product of squarefree numbers.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =6a(5) =10a(6) =42a(7) =42a(8) =82a(9) =204a(10) =1196a(11) =1556a(12) =10324a(13) =34668a(14) =104948a(15) =104964a(16) =873540a(17) =1309396a(18) =11855027a(19) =25238220a(20) =91193575a(21) =453628255a(22) =5002616219a(23) =5902762219a(24) =21142729523a(25) =122981607092a(26) =189706055368a(27) =547296181656