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 A067761 #16 Jun 17 2020 17:15:08 %S A067761 5,10,15,20,25,30,40,45,50,55,60,65,75,80,85,90,95,100,110,115,120, %T A067761 125,130,135,145,150,155,160,165,170,180,185,190,195,200,205,215,220, %U A067761 225,230,235,240,250,255,260,265,270,275,285,290,295,300,305,310,320 %N A067761 Positive integers divisible by 5 but not by 7. %D A067761 Kenneth H. Rosen, Discrete Mathematics and Its Applications, 4th Ed., p. 79, 1.7.32.b. %H A067761 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,0,0,1,-1). %F A067761 a(n) = 5*A047304(n). - _Zak Seidov_, Mar 19 2014 %F A067761 a(n) = a(n - 6) + 35. - _David A. Corneth_, Jun 17 2020 %F A067761 G.f.: 5*x*(x^6+x^5+x^4+x^3+x^2+x+1)/(x^7-x^6-x+1). - _Alois P. Heinz_, Jun 17 2020 %t A067761 Select[Range[65]*5, Mod[5#, 7] != 0 &] (* corrected by _Georg Fischer_, Jun 17 2020 *) %Y A067761 Cf. A047304. %K A067761 nonn,easy %O A067761 1,1 %A A067761 Jonathan A. Heese (macgyver86(AT)aol.com), Feb 06 2002 %E A067761 Edited by _Robert G. Wilson v_, Feb 07 2002 %E A067761 a(36)=205 corrected by _Georg Fischer_, Jun 17 2020