1,2

F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and A. R. Wilks, A Slow-Growing Sequence Defined by an Unusual Recurrence, J. Integer Sequences, Vol. 10 (2007), #07.1.2.

F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and A. R. Wilks, A Slow-Growing Sequence Defined by an Unusual Recurrence [pdf, ps].

a(n) is about 2^(2^(3^(4^(5^...^(n-1))))).

Sequence in context: A078590 A061963 A062228 this_sequence A027891 A073889 A132516

Adjacent sequences: A091406 A091407 A091408 this_sequence A091410 A091411 A091412

nonn,bref

N. J. A. Sloane (njas(AT)research.att.com), based on a suggestion from Dion Gijswijt (gijswijt(AT)science.uva.nl), Mar 04, 2004

Sequence is infinite but next term, about 10^(10^23.09987) (see A091787), is too large to include.