Number of integers k^4 that divide 1!*2!*3!*...*n!.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =8a(6) =10a(7) =36a(8) =64a(9) =200a(10) =432a(11) =630a(12) =1088a(13) =4800a(14) =7590a(15) =32448a(16) =47040a(17) =114240a(18) =164160a(19) =835920a(20) =1302840a(21) =4804800a(22) =7091712a(23) =25243920a(24) =39168000a(25) =171555840a(26) =320973840a(27) =667447200a(28) =1113944832a(29) =3338108928