410625

Appears in sequences

• a(n) = (2*n-1)*(2*n+1)^2.at n=36A102094
• a(n) = 5*a(n-1) + 10*a(n-2), with a(1)=0 and a(2)=1.at n=8A180250
• Expansion of Sum_{k>0} x^k / (1 - (2 * x)^k)^(k+1).at n=14A360798