1,2
The next four terms have 617, 10922, 217833 and 4871823 digits respectively. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 07 2006
a(n) = A000312(A000312(n)) = n^A007778(n) = A002488(n)^n = A002489(n)^A000169(n)
Sequence in context: A018859 A180699 A195529 * A051333 A182912 A043676
Adjacent sequences: A004214 A004215 A004216 * A004218 A004219 A004220
nonn,easy,bref
Henry Bottomley (se16(AT)btinternet.com), Jun 08 2000
