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 A050767 #8 Jan 03 2016 15:50:09 %S A050767 11,23,83,149,167,251,269,881,2039,5021,9311,35111,82219,89809,181421, %T A050767 289099,420899,885839,996157,1963799,2554439,2843903,3269039,3632701, %U A050767 4648519,6448103,9748579,35200439,71927183,82216501,283709077 %N A050767 Let f(m) = smallest composite number that takes m steps of "add prime factors to number" to reach a prime and g(m) be the prime that is reached. Sequence gives values of g(m), sorted and duplicates removed. %H A050767 C. Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_066.htm">See also related puzzle</a> %e A050767 23 is included as it is both g(2) (with f(2)=8) and g(3) (with f(3)=4): '8' + (2+2+2) => 14 + (2+7) => 23; '4' + (2+2) => 8 + (2+2+2) => 14 + (2+7) => 23. %Y A050767 Cf. A050703, A050710 (for f(n)). %K A050767 nonn,nice %O A050767 0,1 %A A050767 _Patrick De Geest_, Sep 15 1999