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A051191
a(n) = 2^(2^n-2).
2
1, 4, 64, 16384, 1073741824, 4611686018427387904, 85070591730234615865843651857942052864, 28948022309329048855892746252171976963317496166410141009864396001978282409984
OFFSET
1,2
COMMENTS
The next term, a(9), has 154 digits. - Harvey P. Dale, Apr 13 2012
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..11
Delbrin Ahmed, On subuniverses of lattices and semilattices, Ph. D. Thesis, Univ. of Szeged (Hungary, 2022).
MATHEMATICA
2^(2^Range[9]-2) (* Harvey P. Dale, Apr 13 2012 *)
CROSSREFS
Sequence in context: A372813 A229867 A362383 * A120581 A146520 A030176
KEYWORD
nonn,easy
AUTHOR
Matt Kasper (matt192837(AT)hotmail.com)
EXTENSIONS
a(8) from Harvey P. Dale, Apr 13 2012
STATUS
approved