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 A051191 #13 Mar 22 2022 18:53:11 %S A051191 1,4,64,16384,1073741824,4611686018427387904, %T A051191 85070591730234615865843651857942052864, %U A051191 28948022309329048855892746252171976963317496166410141009864396001978282409984 %N A051191 a(n) = 2^(2^n-2). %C A051191 The next term, a(9), has 154 digits. - _Harvey P. Dale_, Apr 13 2012 %H A051191 Michael De Vlieger, <a href="/A051191/b051191.txt">Table of n, a(n) for n = 1..11</a> %H A051191 Delbrin Ahmed, <a href="http://www.math.u-szeged.hu/~czedli/dr-reposit/phdtheses/delbrin-ahmed-d.pdf">On subuniverses of lattices and semilattices</a>, Ph. D. Thesis, Univ. of Szeged (Hungary, 2022). %t A051191 2^(2^Range[9]-2) (* _Harvey P. Dale_, Apr 13 2012 *) %K A051191 nonn,easy %O A051191 1,2 %A A051191 Matt Kasper (matt192837(AT)hotmail.com) %E A051191 a(8) from _Harvey P. Dale_, Apr 13 2012