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 A225548 #4 May 13 2013 00:18:24 %S A225548 2,9,12,80,625,1792,2025,321489,720896,5764801,937890625,5208653241, %T A225548 55834574848,2234039306640625,45949729863572161,313160411915961129, %U A225548 313594649253062377472,7123773809250362976481,664987601339817047119140625,992334624064536108066118386802209 %N A225548 Numbers of the form prime(i)^2^(i-1) or prime(i)^2^(j-1)*prime(j)^2^(i-1) with i and j distinct integers. %C A225548 These numbers are the "basic" fixed points of A225546. %H A225548 Paul Tek, <a href="/A225548/b225548.txt">Table of n, a(n) for n = 1..60</a> %e A225548 5764801 = 7^8 = prime(4)^2^(4-1); hence 5764801 is in the sequence. %e A225548 2234039306640625 = 5^16*11^4 = prime(3)^2^(5-1)*prime(5)^2^(3-1); hence 2234039306640625 is in the sequence. %Y A225548 Cf. A000040, A000079, A225547. %K A225548 nonn %O A225548 1,1 %A A225548 _Paul Tek_, May 10 2013