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 A004939 #23 Dec 05 2023 01:39:56 %S A004939 0,7,14,21,27,34,41,48,55,62,69,75,82,89,96,103,110,117,123,130,137, %T A004939 144,151,158,164,171,178,185,192,199,206,212,219,226,233,240,247,254, %U A004939 260,267,274,281,288,295,302,308 %N A004939 a(n) = round(n*phi^4), where phi is the golden ratio, A001622. %H A004939 Paolo Xausa, <a href="/A004939/b004939.txt">Table of n, a(n) for n = 0..10000</a> %t A004939 Round[Range[0,100]GoldenRatio^4] (* _Paolo Xausa_, Oct 28 2023 *) %o A004939 (Magma) [Round(n*(7+3*Sqrt(5))/2): n in [0..80]]; // _G. C. Greubel_, Dec 04 2023 %o A004939 (SageMath) [round(golden_ratio^4*n) for n in range(81)] # _G. C. Greubel_, Dec 04 2023 %Y A004939 Cf. A001622, A004940, A004941, A004942, A004943. %K A004939 nonn %O A004939 0,2 %A A004939 _N. J. A. Sloane_