0,2
Seen in a book of childrens' puzzles.
Table of n, a(n) for n=0..7.
A. V. Aho and N. J. A. Sloane, Some doubly exponential sequences, Fib. Quart., 11 (1973), 429-437.
Index entries for sequences of form a(n+1)=a(n)^2 + ...
Sequence in context: A020767 A036603 * A092501 A209234 A086996 A004284
Adjacent sequences: A092497 A092498 A092499 * A092501 A092502 A092503
nonn
N. J. A. Sloane, Apr 07 2004
approved