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 A358058 #25 Feb 16 2025 08:34:04 %S A358058 3,6,12,48,51,330,1100,702,8120,980,5499,110880,10472,2688,2127411, %T A358058 517104,710640,396480,2761803,4254120,13347975,707000,3655827 %N A358058 a(n) is the index of the smallest n-gonal number divisible by exactly n n-gonal numbers. %H A358058 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PolygonalNumber.html">Polygonal Number</a> %Y A358058 Cf. A358859. %K A358058 nonn,more %O A358058 3,1 %A A358058 _Ilya Gutkovskiy_, Dec 12 2022