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 A322048 #16 Dec 28 2018 13:45:25 %S A322048 1,5,15,35,81,173,357,725,1461,2933,5877,11765,23541,47093,94197, %T A322048 188405 %N A322048 Final elements in rows when A322050 is displayed as a triangle. %C A322048 Needs more terms and a b-file. %F A322048 Conjectures: a(n) = 2*a(n-1) + 11 for n >= 5; G.f. = x*(6*x^4+2*x^2+2*x+1)/((1-x)*(1-2*x)). %F A322048 a(n) = A322050(2^n) = A319019(2^n)/8. - _M. F. Hasler_, Dec 27 2018 %Y A322048 Cf. A319018, A319019, A322049, A322050. %K A322048 nonn,more %O A322048 1,2 %A A322048 _N. J. A. Sloane_, Dec 15 2018 %E A322048 a(12)-a(16) from _Rémy Sigrist_, Dec 17 2018 %E A322048 Offset changed from 0 to 1 by _M. F. Hasler_, Dec 27 2018