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 A160547 #22 Nov 24 2023 12:42:26
%S A160547 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,
%T A160547 27,28,29,30,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,
%U A160547 51,52,53,54,55,56,57,58,59,60,61,63,64,65,66,67,68,69,70,71,72,73,74
%N A160547 Numbers coprime to 31.
%H A160547 <a href="/index/Rec#order_31">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,-1).
%F A160547 a(n) = n+floor((n-1)/(p-1)) where p=31 in this case. - _Roger M Ellingson_, Nov 14 2023
%t A160547 With[{nn=100},Complement[Range[nn],31*Range[Floor[nn/31]]]] (* _Harvey P. Dale_, Nov 29 2017 *)
%o A160547 (Sage) [i for i in range(0,100) if gcd(31, i) == 1]
%Y A160547 Row 31 of A126572.
%Y A160547 Complement of A135631.
%K A160547 nonn,easy
%O A160547 1,2
%A A160547 _Zerinvary Lajos_, May 18 2009
%E A160547 Name edited by _Roger M Ellingson_, Nov 14 2023