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%I #13 Mar 22 2022 18:53:11
%S 1,4,64,16384,1073741824,4611686018427387904,
%T 85070591730234615865843651857942052864,
%U 28948022309329048855892746252171976963317496166410141009864396001978282409984
%N a(n) = 2^(2^n-2).
%C The next term, a(9), has 154 digits. - _Harvey P. Dale_, Apr 13 2012
%H Michael De Vlieger, <a href="/A051191/b051191.txt">Table of n, a(n) for n = 1..11</a>
%H 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 2^(2^Range[9]-2) (* _Harvey P. Dale_, Apr 13 2012 *)
%K nonn,easy
%O 1,2
%A Matt Kasper (matt192837(AT)hotmail.com)
%E a(8) from _Harvey P. Dale_, Apr 13 2012
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