475648

Appears in sequences

• Expansion of (1-x)/(1+2*x^2-2*x^3).at n=28A078034
• a(n) = smallest number x such that sigma(x) = 2x + 2n.at n=47A087998
• G.f. satisfies A(x) = sqrt( (1 + 2*x*A(x)) / (1 - 2*x*A(x)) ).at n=9A138020