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 A097618 #11 May 25 2023 12:31:31 %S A097618 3,2,3,2,3,4,5,6,8,10,13,15,18,20,22,25,29,32,33,34,37,39,41,42,44,45 %N A097618 Successive basic U.S. postal rates since "uniform" rates (based on weight, not distance) were adopted in 1863. %H A097618 <a href="http://about.usps.com/who-we-are/postal-history/domestic-letter-rates-since-1863.htm">History of U.S. Postal Service</a> %e A097618 The basic domestic letter rate was 3 cents from 1863 to 1883, then 2 cents until 1917, then 3 cents until 1919 when it dropped to 2 cents for the last time. %Y A097618 See A114062 for another version. %K A097618 nonn,fini,easy %O A097618 0,1 %A A097618 _David Callan_, Sep 20 2004