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 A004217 #18 Jan 18 2025 02:21:12 %S A004217 1,1,256,443426488243037769948249630619149892803 %N A004217 a(n) = (n^n)^(n^n). %C A004217 The next four terms have 617, 10922, 217833 and 4871823 digits respectively. - _Rick L. Shepherd_, May 07 2006 %H A004217 Jinyuan Wang, <a href="/A004217/b004217.txt">Table of n, a(n) for n = 0..4</a> %F A004217 a(n) = A000312(A000312(n)) = n^A007778(n) = A002488(n)^n = A002489(n)^A000169(n). %t A004217 (#^#)^(#^#)&/@Range[4] (* _Harvey P. Dale_, Dec 25 2024 *) %K A004217 nonn,easy %O A004217 0,3 %A A004217 _Henry Bottomley_, Jun 08 2000 %E A004217 a(0) prepended by _Jinyuan Wang_, Jan 17 2025