Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
1,1
Table of n, a(n) for n=1..3.
a(n) = 2^(2*A000668(n)-1)/16 = A139294(n)/16.
Sequence in context: A109111 A004886 A234606 * A003391 A196290 A182446
Adjacent sequences: A139299 A139300 A139301 * A139303 A139304 A139305
bref,nonn
Omar E. Pol, Apr 13 2008
approved