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 A264599 #11 Apr 18 2023 05:07:12 %S A264599 0,0,1,4,8,15,22,34,42,62,75,93,111,142,162,193,217,256,282,335,355, %T A264599 421,457,493,543,619,658,720,776,868,910,982,1024,1144,1212,1284,1354, %U A264599 1490,1536,1662,1738,1850,1950,2046,2114,2260,2365,2490,2556,2782,2859,3027,3123,3261,3387,3547,3643 %N A264599 Partial sums of A257007. %H A264599 Marc P. Technau, <a href="https://web.archive.org/web/20171109080920/http://www.mathematik.uni-wuerzburg.de/~steuding/technau.pdf">The Calkin-Wilf Tree and a Trace Condition</a>, Master's Thesis, Julius-Maximilian’s University of Würzburg, Faculty for Mathematics and Computer Science, 2015. See Psi(n) in Chapter 3. %Y A264599 Cf. A257007, A264597, A264598. %K A264599 nonn %O A264599 1,4 %A A264599 _N. J. A. Sloane_, Nov 19 2015