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 A172235 #12 Jun 25 2022 03:35:30 %S A172235 1,3,5,7,15,23,25,39,53,67,75,89,103,111,131,157,177,197,211,225,245, %T A172235 265,285,311,313,321,353,379,405,449,493,543,587,625,675,701,727,765, %U A172235 791,823,855,875,901,921,959 %N A172235 n-th partial sum of primes of the form 3*k+1/2+-1/2 minus n-th partial sum of primes of the form 3*m-1. %F A172235 a(n) = A172113(n) - A172188(n). %e A172235 a(1) = (3*1+1/2-1/2)-(3*1-1) = 1; %e A172235 a(2) = (3+3*2+1/2+1/2)-(2+3*2-1) = 3. %Y A172235 Cf. A172188, A172113. %Y A172235 Partial sums of A171715. %K A172235 nonn %O A172235 1,2 %A A172235 _Juri-Stepan Gerasimov_, Feb 01 2010 %E A172235 Corrected (453 replaced by 493) by _R. J. Mathar_, May 22 2010