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 A097050 #15 Aug 23 2023 19:52:24
%S A097050 2,2,5,7,11,17,23,29,37,47,59,67,79,97,107,127,137,157,173,191,211,
%T A097050 233,257,277,307,331,353,379,409,439,467,499,541,563,599,631,673,709,
%U A097050 743,787,821,863,907,947,991,1039,1087,1129,1181,1229,1277,1327,1381,1433,1487,1543
%N A097050 Smallest prime > n(n+1)/2.
%H A097050 Vincenzo Librandi, <a href="/A097050/b097050.txt">Table of n, a(n) for n = 0..1000</a>
%F A097050 a(n) = A151800(A000217(n)). - _Michel Marcus_, Nov 13 2015
%t A097050 NextPrime@Table[n(n+1)/2,{n,0,60}] (* _Vladimir Joseph Stephan Orlovsky_, Apr 11 2011 *)
%t A097050 NextPrime[Accumulate[Range[0,60]]] (* _Harvey P. Dale_, Aug 23 2023 *)
%o A097050 (PARI) a(n) = nextprime(n*(n+1)/2+1); \\ _Michel Marcus_, Nov 13 2015
%Y A097050 Cf. A000217, A151800.
%Y A097050 Cf. A060264. See A065383 for another version.
%K A097050 nonn
%O A097050 0,1
%A A097050 _N. J. A. Sloane_, Sep 15 2004, Nov 21 2008