42505

Appears in sequences

• a(n) = 2*a(n-1) + 2*a(n-2) + 2*a(n-3) - a(n-4); a(0)=0, a(1)=1, a(2)=3, a(3)=9, a(4)=25.at n=11A138574
• E.g.f. A(x) satisfies A(x) = 1 + A(x)^5 * Integral 1/A(x)^5 dx.at n=5A234295
• a(n) = binomial(n + 4, n - 1) + 1.at n=20A323228