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 A171895 #5 Mar 30 2012 16:51:56 %S A171895 1,1,2,2,3,3,3,3,3,4,4,5,5,5,5,5,6,6,6,7,7,7,7,8,8,8,8,8,8,9,9,9,9,9, %T A171895 10,10,10,10,10,10,11,11,11,12,12,12,13,13,13,13,13,14,14,14,14,15,15, %U A171895 15,16,16,16,16,17,17,17,18,18,18,18,18,18,19,19,19,19,19,19,19,19,19,20,20,20 %N A171895 Number of distinct terms among the first n terms of A181391. %H A171895 N. J. A. Sloane, <a href="/A171895/b171895.txt">Table of n, a(n) for n = 1..10000</a> %Y A171895 Partial sums of A171894. Essentially A171896 - 1. Cf. A181391. %K A171895 nonn %O A171895 1,3 %A A171895 Vinay Vaishampayan and _N. J. A. Sloane_, Oct 19 2010