If n = p_1^a_1 * p_2^a_2 * p_3^a_3 * ..., where p_k is the k-th prime and the a's are nonnegative integers, then a(n) = n!/product_{k >= 1} [(p_k)!^a_k].
A056218
If n = p_1^a_1 * p_2^a_2 * p_3^a_3 * ..., where p_k is the k-th prime and the a's are nonnegative integers, then a(n) = n!/product_{k >= 1} [(p_k)!^a_k].
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =60a(7) =1a(8) =5040a(9) =10080a(10) =15120a(11) =1a(12) =19958400a(13) =1a(14) =8648640a(15) =1816214400a(17) =1a(19) =1a(23) =1
External references
- oeis: A056218