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 A275915 #15 Jun 05 2018 12:23:59 %S A275915 9,4,4,4,61,10,10,10,116,16,16,16,169,22,22,22,119,26,26,26,259,32,32, %T A275915 32,314,38,38,38,367,44,44,44,421,50,50,50,476,56,56,56,529,62,62,62, %U A275915 319,66,66,66,619,72,72,72,674,78,78,78,727,84,84,84,782,90,90,90,835,96,96,96,489,100 %N A275915 First differences of A273059. %H A275915 Alois P. Heinz, <a href="/A275915/b275915.txt">Table of n, a(n) for n = 0..30287</a> (first 1408 terms from N. J. A. Sloane) %H A275915 Alois P. Heinz, <a href="/A273059/a273059.jpg">Positions of first 1409 1's in plane of A274640</a> %H A275915 Zak Seidov, <a href="/A273059/a273059.png">Graph of first differences of A273059.</a> %H A275915 Zak Seidov, <a href="/A273059/a273059_1.png">Spiral A274640 with ones shown.</a> %Y A275915 Cf. A273059, A274640. %K A275915 nonn %O A275915 0,1 %A A275915 _N. J. A. Sloane_, Aug 28 2016