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 A152582 #9 Jan 30 2022 00:40:44 %S A152582 11,83,6563,43046723,1853020188851843,3433683820292512484657849089283, %T A152582 11790184577738583171520872861412518665678211592275841109096963 %N A152582 Numbers of the form 9^(2^n) + 2. %C A152582 Except for the first term, this sequence is the same as A057727. There appears to be no divisibility rule for this sequence. %o A152582 (PARI) g(a,n) = if(a%2,b=2,b=1);for(x=0,n,y=a^(2^x)+b;print1(y",")) %Y A152582 Cf. A059919 (-1), A011764 (-2). %K A152582 nonn %O A152582 1,1 %A A152582 _Cino Hilliard_, Dec 08 2008