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 A297187 #6 Jan 01 2018 11:00:40 %S A297187 0,2,6,14,35,89,203,444,951,2051,4466,9860,21840,48045,104525,225116, %T A297187 482596,1035632,2232443,4834801,10493117,22741208,49074134,105310087, %U A297187 224848230,478534776,1017589182,2166420553,4622251942,9880423138,21130501759,45125126178 %N A297187 Row sums of triangle A297497. %H A297187 Lars Blomberg, <a href="/A297187/b297187.txt">Table of n, a(n) for n = 0..1000</a> %Y A297187 Cf. A297497. %K A297187 nonn %O A297187 0,2 %A A297187 _N. J. A. Sloane_, Dec 31 2017 %E A297187 Terms a(7) and beyond from _Lars Blomberg_, Jan 01 2018