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 A106479 #11 Nov 16 2024 02:57:11
%S A106479 1,-1,-1,1,-1,3,-3,-1,7,-9,5,-1,-7,25,-27,-3,29,-41,55,-25,-73,161,
%T A106479 -143,-11,217,-387,447,-99,-737,1377,-1219,209,1761,-3999,4357,-1087,
%U A106479 -5311,11463,-12475,4723,12705,-33133,38839,-15005,-35001,90485,-112395,54269,92435,-262555,328759,-165839,-244533
%N A106479 First column in inverse of Euler phi sequence matrix.
%H A106479 Seiichi Manyama, <a href="/A106479/b106479.txt">Table of n, a(n) for n = 0..8642</a>
%F A106479 G.f.: 1/Sum_{k>=0} phi(k+1)*x^k.
%t A106479 T[n_, k_] := If[k <= n, EulerPhi[n - k + 1], 0]; With[{max = 52}, Inverse[Table[T[n, k], {n, 0, max}, {k, 0, max}]][[;; , 1]]] (* _Amiram Eldar_, Nov 16 2024 *)
%Y A106479 Cf. A000010, A106476, A106477, A106478, A106480.
%K A106479 easy,sign
%O A106479 0,6
%A A106479 _Paul Barry_, May 03 2005