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 A004474 #14 Oct 26 2023 00:19:40 %S A004474 0,9,14,7,15,6,1,8,5,12,11,2,10,3,4,13,144,153,158,151,159,150,145, %T A004474 152,149,156,155,146,154,147,148,157,224,233,238,231,239,230,225,232, %U A004474 229,236,235,226,234,227,228,237,112,121,126,119,127,118,113,120,117,124 %N A004474 Nim product 9 * n. %D A004474 J. H. Conway, On Numbers and Games. Academic Press, NY, 1976, pp. 51-53. %H A004474 R. J. Mathar, <a href="/A004474/b004474.txt">Table of n, a(n) for n = 0..1000</a> %H A004474 <a href="/index/Ni#Nimmult">Index entries for sequences related to Nim-multiplication</a> %F A004474 a(n) = A051775(9,n) = A051775(n,9). %K A004474 nonn %O A004474 0,2 %A A004474 _N. J. A. Sloane_ %E A004474 More terms from _Erich Friedman_