Number of non-unitary but squarefree divisors of n!. Also number of unitary but not-squarefree divisors of n!.
A056675
Number of non-unitary but squarefree divisors of n!. Also number of unitary but not-squarefree divisors of n!.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =2a(4) =4a(5) =6a(6) =12a(7) =12a(8) =12a(9) =14a(10) =28a(11) =28a(12) =56a(13) =60a(14) =60a(15) =60a(16) =120a(17) =120a(18) =240a(19) =240a(20) =240a(21) =248a(22) =496a(23) =496a(24) =496a(25) =504a(26) =504a(27) =504a(28) =1008a(29) =1008
External references
- oeis: A056675