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 A106780 #7 Sep 08 2022 08:45:18 %S A106780 599999,788999,799979,888989,889997,897899,898889,969989,979889, %T A106780 988979,996899,997889,998897,998969,999599,999959,1598999,1699799, %U A106780 1789979,1798997,1799969,1859999,1886999,1888979,1889969,1896899,1896989,1897979,1899797 %N A106780 Primes with digit sum = 50. %H A106780 Vincenzo Librandi, <a href="/A106780/b106780.txt">Table of n, a(n) for n = 1..3300</a> %t A106780 Select[Prime[Range[190000]], Total[IntegerDigits[#]]==50 &] (* _Vincenzo Librandi_, Jul 09 2014 *) %o A106780 (Magma) [p: p in PrimesUpTo(1900000) | &+Intseq(p) eq 50]; // _Vincenzo Librandi_, Jul 09 2014 %Y A106780 Cf. similar sequences listed in A244918. %K A106780 nonn,base %O A106780 1,1 %A A106780 _Zak Seidov_, May 16 2005 %E A106780 More terms from _Vincenzo Librandi_, Jul 09 2014