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 A172115 #15 Jul 22 2025 04:20:46 %S A172115 3,7,12,19,30,43,60,83,112,155,202,285,416,553,912,1343,1776,2225, %T A172115 2734,3303,3874,6845,11568,16955,26266,35943,50374,75935,106692, %U A172115 142691,180202,231035,312874,417785,547806,695897,897004,1294383,1728164,2318205,2911894,3516605 %N A172115 Partial sums of A001605. %H A172115 Amiram Eldar, <a href="/A172115/b172115.txt">Table of n, a(n) for n = 1..56</a> (calculated from the data at A001605) %e A172115 a(1) = 3. %e A172115 a(2) = 3 + 4 = 7. %e A172115 a(3) = 3 + 4 + 5 = 12. %Y A172115 Cf. A001605, A001578, A005478, A086597, A080345. %K A172115 hard,nonn %O A172115 1,1 %A A172115 _Jonathan Vos Post_, Jan 25 2010 %E A172115 a(40) onwards from _Amiram Eldar_, Jul 22 2025