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 A161915 #6 Feb 16 2025 08:33:10 %S A161915 2,2,8,2,5,2,5,4,8,7,2,8,1,5,7,5,8,1,2,4,8,5,7,2,8,2,1,5,5,7,7,4,5,4, %T A161915 5,8,1,7,2,1,5,8,2,4,2,8,5,7,4,2,4,8,5,2,2,8,7,1,4,4,8,2,4,8,7,2,8,1, %U A161915 5,2,4,2,1,2,4,5,5,7,8,1,7,2,8,5,8,2,8,2,5,7,8,2,1,5,8,5,1,5,7,8,7,2,5,2,4 %N A161915 Digital root of Ramanujan primes (A104272). %H A161915 Eric W. Weisstein, <a href="https://mathworld.wolfram.com/RamanujanPrime.html">Ramanujan Prime</a> %e A161915 659 is a Ramanujan's prime whose digital root is 2. %Y A161915 A104272 %K A161915 nonn,base %O A161915 1,1 %A A161915 _Parthasarathy Nambi_, Jun 22 2009 %E A161915 a(53) corrected by _R. J. Mathar_, Jul 08 2009