Number of integers k^6 that divide 1!*2!*3!*...*n!.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =8a(8) =18a(9) =42a(10) =64a(11) =200a(12) =432a(13) =546a(14) =960a(15) =3888a(16) =6000a(17) =15180a(18) =29952a(19) =38976a(20) =67200a(21) =285600a(22) =393984a(23) =1632960a(24) =3175200a(25) =4165392a(26) =6105600a(27) =38413440a(28) =55339200a(29) =114048000