0,1

Sum_{k>=0} 1/a(k) = log(3)/16 [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Oct 20 2009]

G.f.: 3*(1+x)*(5+206*x+5*x^2)/(1-x)^4 [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Oct 20 2009]

Sequence in context: A092958 A079600 A166186 this_sequence A062079 A062032 A117812

Adjacent sequences: A001517 A001518 A001519 this_sequence A001521 A001522 A001523

nonn

N. J. A. Sloane (njas(AT)research.att.com).