Least number such that the product of its digits in factorial base is n.

Terms

a(0) =1a(1) =5a(2) =21a(3) =17a(4) =633a(5) =23a(6) =36153a(7) =65a(8) =93a(9) =635a(10) =443122713a(11) =71a(12) =81474226713a(13) =36155a(14) =645a(15) =113a(17) =95a(19) =641a(20) =36165a(21) =443122715a(23) =119a(24) =4233a(25) =81474226715a(26) =453a(27) =36161a(29) =647