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 A169886 #16 Mar 09 2023 08:24:20 %S A169886 0,1,6,1,6,5,6,1,6,1,10000,14641,18426,12481,16666,10005,14646,18421, %T A169886 12486,16661,60000,62481,64646,66661,68426,60005,62486,64641,66666, %U A169886 68421,10000,18421,16666,14641,12486,10005,18426,16661,14646,12481,60000,66661,62486 %N A169886 Fourth powers (n * n * n * n) in carryless arithmetic mod 10. %H A169886 Seiichi Manyama, <a href="/A169886/b169886.txt">Table of n, a(n) for n = 0..9999</a> %H A169886 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %o A169886 (PARI) a(n) = fromdigits(Vec(Pol(digits(n))^4)%10); \\ _Seiichi Manyama_, Mar 09 2023 %Y A169886 Cf. A004520, A059729, A168294, A168541, A169884, A169885. %K A169886 nonn,base,look %O A169886 0,3 %A A169886 _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jul 06 2010