Numbers n such that all the divisors of n appear as substrings in n^3.

Terms

a(0) =1a(1) =5a(2) =25a(3) =49a(4) =125a(5) =251a(6) =499a(7) =751a(8) =1249a(9) =4999a(10) =18229a(11) =31249a(12) =49999a(13) =281249a(14) =4218751a(15) =4999999a(16) =9590417a(17) =31622777a(18) =68171507a(19) =74218751a(20) =574218751a(21) =5740883989a(22) =8829261293