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 A170985 #14 Mar 09 2023 09:57:53 %S A170985 0,1,0,1,16,25,16,25,0,1,0,1,16,25,16,25,256,289,256,289,400,441,400, %T A170985 441,256,289,256,289,400,441,400,441,0,1,0,1,16,25,16,25,0,1,0,1,16, %U A170985 25,16,25,256,289,256,289,400,441,400,441,256,289,256,289,400,441,400,441,4096,4225 %N A170985 Carryless product n X n in base 4. %H A170985 Seiichi Manyama, <a href="/A170985/b170985.txt">Table of n, a(n) for n = 0..4095</a> %H A170985 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 A170985 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %o A170985 (PARI) a(n) = fromdigits(Vec(Pol(digits(n, 4))^2)%4, 4); \\ _Seiichi Manyama_, Mar 09 2023 %Y A170985 For bases 2 through 10 see A000695, A169999, A170985-A170990 and A059729. %K A170985 nonn,base,look %O A170985 0,5 %A A170985 _N. J. A. Sloane_, Aug 29 2010