4394415

Appears in sequences

• Expansion of (1+x^4*C)*C^4, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=12A071745
• Expansion of Product_{k>=1} (1 + x^k)^A007434(k).at n=20A301876