39918

Appears in sequences

• Expansion of -(sqrt(-3*x^2-2*x+1)-x-1)/(2*sqrt(-3*x^2-2*x+1)+2*x).at n=13A188442
• G.f.: Sum_{k>=0} x^(k*(k+1)/2) / Product_{j=1..k} (1 - x^(2*j-1))^2.at n=45A376624
• Expansion of g/(1 - x^2*g^5), where g = 1+x*g^2 is the g.f. of A000108.at n=9A391036