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 A385987 #8 Jul 21 2025 21:42:12
%S A385987 2,3,5,11,31,67,197,887,1523,1783,2473,2789,3121,3469,3833,4783,4993,
%T A385987 5849,6079,6547,7757,8543,9091,10501,12011,16519,18787,19993,20407,
%U A385987 21661,22091,23827,27427,29837,30841,32371,33937,34471,37699,38261,42223,43411,50033
%N A385987 Prime numbers of the form A385986(1) + ... + A385986(k) for some k > 0.
%H A385987 Rémy Sigrist, <a href="/A385987/b385987.txt">Table of n, a(n) for n = 1..10000</a>
%e A385987 A385986(1) + ... + A385986(5) = 2 + 1 + 2 + 3 + 3 = 11 is prime, so 11 appears in this sequence.
%o A385987 (PARI) { v = 2; t = 0; for (n = 1, 323, if (isprime(t += v), print1 (t", "); v = n;);); }
%Y A385987 Cf. A385986.
%K A385987 nonn
%O A385987 1,1
%A A385987 _Rémy Sigrist_, Jul 14 2025