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 A264724 #10 Sep 08 2022 08:46:14
%S A264724 2,5,11,18,29,38,55,68,87,104,131,148,181,202,233,264,305,330,379,408,
%T A264724 453,494,551,584,645,688,747,796,869,908,991,1040,1109,1172,1249,1308,
%U A264724 1405,1462,1545,1616,1721,1776,1891,1956,2049,2138,2255,2320,2443,2520
%N A264724 a(n) = n^2 + phi(n).
%F A264724 a(n) = A000290(n) + A000010(n).
%e A264724 a(5) = 29, because phi(5) = 4 and 5^2 + 4 = 29.
%t A264724 Table[n^2 + EulerPhi[n], {n, 50}]
%o A264724 (Magma) [n^2+EulerPhi(n): n in [1..50]];
%o A264724 (PARI) a(n) = n^2 + eulerphi(n); \\ _Altug Alkan_, Nov 24 2015
%Y A264724 Cf. A000010, A000290, A258434.
%K A264724 nonn,easy
%O A264724 1,1
%A A264724 _Vincenzo Librandi_, Nov 24 2015