459008

Appears in sequences

• G.f.: Sum_{n>=0} x^n / ( (1+x)^(n+1) * (1 - 2*(n+1)*x) ).at n=9A245373
• Expansion of (2*x+4*x^2) / (1-2*x-2*x^2+2*x^3).at n=14A285185