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 A044883 #5 Mar 30 2012 18:56:49 %S A044883 1729,1730,1731,1732,1733,1734,1735,1736,1737,1738,1739,1741,1754, %T A044883 1767,1780,1793,1806,1819,1832,1845,1858,1871,1873,1874,1875,1876, %U A044883 1877,1878,1879,1880,1881,1882,1883,1896,1897,1899 %N A044883 Numbers having, in base 12, (sum of even run lengths)=(sum of odd run lengths). %K A044883 nonn,base %O A044883 1,1 %A A044883 _Clark Kimberling_