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 A004480 #27 Oct 26 2023 00:22:39 %S A004480 0,15,5,10,1,14,4,11,2,13,7,8,3,12,6,9,240,255,245,250,241,254,244, %T A004480 251,242,253,247,248,243,252,246,249,80,95,85,90,81,94,84,91,82,93,87, %U A004480 88,83,92,86,89,160,175,165,170,161,174,164,171,162,173,167,168,163,172 %N A004480 Nim product 15 * n. %D A004480 J. H. Conway, On Numbers and Games. Academic Press, NY, 1976, pp. 51-53. %H A004480 <a href="/index/Ni#Nimmult">Index entries for sequences related to Nim-multiplication</a> %K A004480 nonn %O A004480 0,2 %A A004480 _N. J. A. Sloane_ %E A004480 More terms from _Erich Friedman_