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 A172167 #9 Oct 12 2024 02:28:55
%S A172167 2,5,10,17,30,47,66,103,176,273,382,545,738,995,1428,1915,2492,3261,
%T A172167 4414,5711,7170,9763,12680,16137,20026,30395,42684,60181,78614,117981,
%U A172167 170470,236007,375976,523433,733386,1065163,1537556,2167413,2913910
%N A172167 Partial sums of A005109.
%F A172167 a(n) = Sum_{i=1..n} A005109(i).
%e A172167 a(20) = 2 + 3 + 5 + 7 + 13 + 17 + 19 + 37 + 73 + 97 + 109 + 163 + 193 + 257 + 433 + 487 + 577 + 769 + 1153 + 1297 = 5711.
%Y A172167 Cf. A005109.
%K A172167 easy,nonn
%O A172167 1,1
%A A172167 _Jonathan Vos Post_, Jan 28 2010
%E A172167 More terms from _R. J. Mathar_, Feb 07 2010