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 A051917 #25 Aug 21 2025 15:29:50 %S A051917 1,3,2,15,12,9,11,10,6,8,7,5,14,13,4,170,160,109,107,131,139,116,115, %T A051917 228,234,92,89,73,77,220,209,85,214,80,219,199,179,203,184,66,226,70, %U A051917 236,156,247,149,248,255,182,189,240,120,164,174,127,142,100,98,134 %N A051917 Inverse of n under Nim (or Conway) multiplication. %C A051917 The Conway product makes N into a field of characteristic 2. This is the inverse function for that field. %D A051917 E. R. Berlekamp, J. H. Conway and R. K. Guy, ``Winning Ways'', p. 443. %D A051917 J. H. Conway, ``On Numbers and Games'', chapter 6. %H A051917 Paul Tek, <a href="/A051917/b051917.txt">Table of n, a(n) for n = 1..255</a> %H A051917 David A. Madore, <a href="http://www.eleves.ens.fr:8080/home/madore/math/games.ps.gz">Notes on game theory</a> %H A051917 <a href="/index/Ni#Nimmult">Index entries for sequences related to Nim-multiplication</a> %e A051917 a(4)=15 because the Conway product of 4 and 15 is 1. And a(15)=4. %Y A051917 Cf. A051776. %K A051917 easy,nice,nonn,changed %O A051917 1,2 %A A051917 _David A. Madore_, Dec 18 1999 %E A051917 More terms from _John W. Layman_, Mar 01 2001