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 A249601 #11 Apr 17 2023 17:48:00
%S A249601 9,7,8,7,1,3,7,6,3,7,4,7,7,9,1,8,1,2,2,9,6,3,2,3,5,2,1,6,7,8,4,0,0,4,
%T A249601 7,2,1,2,6,4,9,2,7,7,5,9,2,1,0,2,0,1,0,4,8,4,4,4,2,1,0,7,6,8,1,0,4,6,
%U A249601 9,7,1,9,1,9,6,9,5,1,4,4,3,8,5,1,3,5,1,2,8,7,9,7,7,2
%N A249601 Decimal expansion of 1/phi + 1/phi^3 + 1/phi^5 + 1/phi^7, where phi is the Golden Ratio.
%C A249601 1/phi + 1/phi^3 + 1/phi^5 + 1/phi^7 + 1/phi^9 + ... = 1.
%D A249601 David Snook, Email, Mar 31 2009
%p A249601 3*(7*sqrt(5)-15)/2 ; evalf(%) ; # _R. J. Mathar_, Nov 14 2014
%t A249601 RealDigits[Total[1/GoldenRatio^{1,3,5,7}],10,120][[1]] (* _Harvey P. Dale_, Apr 17 2023 *)
%Y A249601 Cf. A094214, A249600.
%K A249601 nonn,cons
%O A249601 0,1
%A A249601 _N. J. A. Sloane_, Nov 02 2014