1,1
Table of n, a(n) for n=1..3.
a(1) = 2; a(2) = 2^3; a(3) = 2^3^5.
Cf. A140319, A248012.
Sequence in context: A024340 A012667 A124075 * A019315 A127558 A324330
Adjacent sequences: A260545 A260546 A260547 * A260549 A260550 A260551
nonn
Peter Woodward, Jul 29 2015
approved