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 A014173 #8 Jul 08 2025 02:54:15 %S A014173 1,4,11,25,52,103,198,377,717,1366,2609,5016,9707,18882,36864,72151, %T A014173 141739,279335,551783,1091651,2161875,4284004,8501136,16890969, %U A014173 33591903,66847031,133075695,264984011 %N A014173 Apply partial sum operator thrice to Stern's sequence. %H A014173 <a href="/index/St#Stern">Index entries for sequences related to Stern's sequences</a> %Y A014173 Cf. A005230. %K A014173 nonn %O A014173 0,2 %A A014173 _N. J. A. Sloane_