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 A087709 #8 Sep 02 2023 16:58:22 %S A087709 4,4,1,4,3,2,4,8,3,354,18,4,58,8,5,9,354,6,18,19,7,58,13,8,14,69,9,44, %T A087709 354,10,29,18,11,19,33,12,58,3569,13,104,23,14,24,69,15,43,44,16,354, %U A087709 28,17,29,83,18,143,243,19,54,33,20,34,58,21,3569,169,22,104,38,23,39,308,24 %N A087709 A087708/5. %o A087709 (Python) %o A087709 from fractions import Fraction %o A087709 def A087709(n): %o A087709 x = Fraction(n) %o A087709 while x.denominator > 1 or x<=n: %o A087709 x = Fraction(5*x.__ceil__(),3) %o A087709 return int(x)//5 # _Chai Wah Wu_, Sep 02 2023 %K A087709 nonn %O A087709 1,1 %A A087709 _N. J. A. Sloane_, Sep 29 2003