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 A164629 #13 Feb 06 2023 12:48:15 %S A164629 1,3,0,2,1,1,1,3,4,2,3,0,4,1,2,0,2,4,2,2,3,1,4,4,3,1,1,4,0,2,0,4,0,2, %T A164629 1,2,1,1,1,0,3,3,1,3,3,0,4,0,0,4,0,2,4,1,0,2,2,3,0,1,1,0,4,3,4,2,2,2, %U A164629 1,4,4,2,1,2,1,1,4,4,3,2,2,2,1,0,3,1,2,4,1,0 %N A164629 Expansion of phi (golden ratio) in base 5. %t A164629 RealDigits[(1 + Sqrt[5])/2, 5, 90] %t A164629 RealDigits[GoldenRatio,5,120][[1]] (* _Harvey P. Dale_, Jan 19 2021 *) %o A164629 (PARI) default(realprecision, 1000); x=(1+sqrt(5))/2; %o A164629 for(n=1, 100, d=floor(x); x=(x-d)*5; print1(d, ", ")); \\ _Jinyuan Wang_, Mar 21 2020 %o A164629 (PARI) a(n) = floor(quadgen(5)*5^(n-1))%5 \\ _Chittaranjan Pardeshi_, Feb 06 2023 %Y A164629 Cf. A001622, A004714. %K A164629 nonn,base,cons %O A164629 1,2 %A A164629 Keith Rarick, Dan McCandless (kr(AT)xph.us), Aug 18 2009