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 A170989 #13 Mar 09 2023 10:01:00 %S A170989 0,1,4,1,0,1,4,1,64,81,100,113,64,81,100,113,256,289,260,289,256,289, %T A170989 260,289,64,113,100,81,64,113,100,81,0,1,4,1,0,1,4,1,64,81,100,113,64, %U A170989 81,100,113,256,289,260,289,256,289,260,289,64,113,100,81,64,113,100,81,4096,4225 %N A170989 Carryless product n X n in base 8. %H A170989 Seiichi Manyama, <a href="/A170989/b170989.txt">Table of n, a(n) for n = 0..4095</a> %H A170989 David Applegate, Marc LeBrun and N. J. A. Sloane, <a href="http://neilsloane.com/doc/carry1.pdf">Carryless Arithmetic (I): The Mod 10 Version</a>. %H A170989 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %o A170989 (PARI) a(n) = fromdigits(Vec(Pol(digits(n, 8))^2)%8, 8); \\ _Seiichi Manyama_, Mar 09 2023 %Y A170989 For bases 2 through 10 see A000695, A169999, A170985-A170990 and A059729. %K A170989 nonn,base,look %O A170989 0,3 %A A170989 _N. J. A. Sloane_, Aug 29 2010