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 A158805 #3 Mar 30 2012 18:52:03 %S A158805 1,1,1,1,3,3,3,3,3,7,7,9,3,3,3,3,9,9,3,3,3,19,13,21,6,6,6,3,9,9,3,3,3, %T A158805 21,21,27,3,3,3,3,9,9,9,9,9,37,25,39,3,3,3,6,18,18,3,3,3,21,21,27,9,9, %U A158805 9,3,9,9,3,3,3,57,39,63,6,6,6,3,9,9,10,10,10,21,21,27,3,3,3,9,27,27,3,3,3,61 %N A158805 a(3n) = A145511(n+1). a(3n+1) = A145501(n+1). a(3n+2) =A145444(n+1). %C A158805 Why would one clump the three series in this way? [_R. J. Mathar_, Apr 08 2009] %Y A158805 Cf. A112593. %K A158805 nonn %O A158805 0,5 %A A158805 _Paul Curtz_, Mar 27 2009 %E A158805 Edited and extended by _R. J. Mathar_, Apr 08 2009