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: A087930 A139304 A018859 this_sequence A051333 A043676 A045030

Adjacent sequences: A004214 A004215 A004216 this_sequence A004218 A004219 A004220

nonn,easy,bref

Henry Bottomley (se16(AT)btinternet.com), Jun 08 2000