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 A131425 #7 Nov 28 2024 15:35:39
%S A131425 1,5,16,33,68,101,156,205,280,389,468,605,732,841,988,1181,1392,1545,
%T A131425 1784,1999,2182,2463,2714,3027,3410,3709,3964,4283,4554,4893,5564,
%U A131425 5947,6410,6751,7386,7755,8282,8827,9310,9887,10482,10923,11722,12191,12758,13243
%N A131425 Row sums of triangle A131424.
%H A131425 Andrew Howroyd, <a href="/A131425/b131425.txt">Table of n, a(n) for n = 1..1000</a>
%F A131425 a(n) = n*(prime(n) - 3) + Sum_{k=1..n} prime(k). - _Andrew Howroyd_, Aug 28 2018
%e A131425 a(4) = 33 = sum of row 4 terms of triangle A131424: (6 + 7 + 9 + 11).
%t A131425 Table[n (Prime[n]-3)+Sum[Prime[k],{k,n}],{n,50}] (* _Harvey P. Dale_, Nov 28 2024 *)
%o A131425 (PARI) a(n)={n*(prime(n) - 3) + sum(k=1, n, prime(k))} \\ _Andrew Howroyd_, Aug 28 2018
%Y A131425 Cf. A131424, A131426, A127640, A000040.
%K A131425 nonn
%O A131425 1,2
%A A131425 _Gary W. Adamson_, Jul 10 2007
%E A131425 Terms a(10) and beyond from _Andrew Howroyd_, Aug 28 2018