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A004217
a(n) = (n^n)^(n^n).
2
1, 1, 256, 443426488243037769948249630619149892803
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
The next four terms have 617, 10922, 217833 and 4871823 digits respectively. - Rick L. Shepherd, May 07 2006
LINKS
Jinyuan Wang, Table of n, a(n) for n = 0..4
FORMULA
a(n) = A000312(A000312(n)) = n^A007778(n) = A002488(n)^n = A002489(n)^A000169(n).
MATHEMATICA
(#^#)^(#^#)&/@Range[4] (* Harvey P. Dale, Dec 25 2024 *)
CROSSREFS
Sequence in context: A018859 A180699 A195529 * A351309 A051333 A273775
Adjacent sequences: A004214 A004215 A004216 * A004218 A004219 A004220
KEYWORD
nonn,easy
AUTHOR
Henry Bottomley, Jun 08 2000
EXTENSIONS
a(0) prepended by Jinyuan Wang, Jan 17 2025
STATUS
approved

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Last modified May 21 17:23 EDT 2026. Contains 395799 sequences.
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