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%I #14 Jun 28 2021 18:48:13
%S 1,2,6,46662
%N a(1)=1. a(n) = a(n-1) + a(n-1)^a(n-1).
%C Next term is too large to include.
%C The next term has 217864 digits. - _Harvey P. Dale_, Jun 28 2021
%t FoldList[#2 + #1^#1 &, 1, {1, 2, 6}] (* _G. C. Greubel_, Oct 12 2016 *)
%t NestList[#+#^#&,1,4] (* _Harvey P. Dale_, Jun 28 2021 *)
%K nonn
%O 1,2
%A _Leroy Quet_, Dec 10 2007