This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A067401 #4 Aug 02 2017 23:47:32 %S A067401 15,85,95,111,123,125,175,191,207,223,239,243,245,247,251,253,351,367, %T A067401 379,381,399,415,443,445,447,463,483,487,493,499,501,507,585,603,621, %U A067401 631,639,685,687,701,725,729,731,735,757,763,783,799,827,831,873,877 %N A067401 Minimal non-uniquely factorizable OR-numbrals, i.e., numbrals that are not uniquely factorizable but for which all proper divisors are. %C A067401 See A048888 for the definition of OR-numbral arithmetic. %e A067401 15 is in A067401 since [15] = [3] * [5] = [3]^3 all divisors of [15] are uniquely factorizable. %Y A067401 Cf. A003986, A007059, A048888, A067138, A067139, A067398, A067399, A067400. %K A067401 nonn %O A067401 1,1 %A A067401 _Jens Voß_, Jan 24 2002