1,1
Table of n, a(n) for n=1..4.
a(n) = 2^(2*A000668(n) - 1)/4 = A139294(n)/4.
Sequence in context: A299306 A299464 A300107 * A004819 A001375 A281651
Adjacent sequences: A139295 A139296 A139297 * A139299 A139300 A139301
nonn
Omar E. Pol, Apr 13 2008
approved