Numbers k such that the sums of digits of k and 1/k in factorial base (A007623) are equal.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =12a(5) =15a(6) =24a(7) =45a(8) =70a(9) =105a(10) =120a(11) =576a(12) =700a(13) =720a(14) =1008a(15) =1152a(16) =4800a(17) =5040a(18) =5670a(19) =8960a(20) =14175a(21) =17820a(22) =18711a(23) =24640a(24) =25920a(25) =28800a(26) =32256a(27) =33264a(28) =36960a(29) =39312