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 A271511 #14 Sep 08 2022 08:46:16
%S A271511 6,10,21,36,78,105,171,210,300,465,528,741,903,990,1176,1485,1830,
%T A271511 1953,2346,2628,2775,3240,3570,4095,4851,5253,5460,5886,6105,6555,
%U A271511 8256,8778,9591,9870,11325,11628,12561,13530,14196,15225,16290,16653,18528,18915,19701
%N A271511 a(n) = (p+1)*(p+2)/2 where p is the n-th prime.
%C A271511 Subsequence of A253145.
%H A271511 Vincenzo Librandi, <a href="/A271511/b271511.txt">Table of n, a(n) for n = 1..1000</a>
%t A271511 Table[(Prime[n]^2 + 3 Prime[n] + 2) / 2, {n, 50}]
%o A271511 (Magma) [(p+1)*(p+2) / 2: p in PrimesUpTo(200)];
%o A271511 (PARI) lista(nn) = forprime(p=2, nn, print1((p+1)*(p+2)/2, ", ")); \\ _Altug Alkan_, Apr 09 2016
%Y A271511 Cf. A253145.
%K A271511 nonn,easy
%O A271511 1,1
%A A271511 _Vincenzo Librandi_, Apr 09 2016