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 A069255 #12 May 01 2025 06:00:59 %S A069255 1,57,1016801,4363953127297,4713161090115513351681, %T A069255 1297440698667560637290197228189697, %U A069255 91332703321545501540374299322682400349546864641,1645454342039771722949556903599110786025642797921240958290067457,7588492464653843921408409789152927606760448769729047438304822150910706202078740481 %N A069255 a(n) = (2^((2*n-1)^2)+1)/(2^(2*n-1)+1). %H A069255 Amiram Eldar, <a href="/A069255/b069255.txt">Table of n, a(n) for n = 1..29</a> %t A069255 a[n_] := (2^((2*n-1)^2)+1)/(2^(2*n-1)+1); Array[a, 9] (* _Amiram Eldar_, May 01 2025 *) %K A069255 easy,nonn %O A069255 1,2 %A A069255 _Benoit Cloitre_, Apr 14 2002