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 A144075 #9 Feb 16 2025 08:33:08 %S A144075 1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,8,8,8,8,9,9,9, %T A144075 9,10,10,10,10,11,11,11,11,12,12,12,12,13,13,13,13,14,14,14,14,15,15, %U A144075 15,15,16,16,16,16,17,17,17,17,18,18,18,18,19,19,19,19,20,20,20,20,21,21 %N A144075 Duplicate of A008621. %H A144075 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphThickness.html">Graph Thickness</a> %F A144075 G.f.: x(1+x^3-x^4)/((1-x)^2(1+x)(1+x^2)). - _R. J. Mathar_, Sep 12 2008 %t A144075 Ceiling[(n+1)/4] %Y A144075 Cf. A002265, A128929. %K A144075 dead %O A144075 1,4 %A A144075 _Eric W. Weisstein_, Sep 09 2008