1960649

Properties

Appears in sequences

• Expansion of e.g.f. cos(x)/(1+x).at n=10A009102
• a(n) = (2*n)!*Sum_{k = 0..n} (-1)^k/(2*k)!.at n=5A275651
• a(n) is the numerator of Sum_{k=0..n} (-1)^k / (2*k)!.at n=5A354138
• Prime numbersat n=146230