4397730

Appears in sequences

• G.f.: A(x) = 1 + x*exp( Sum_{k>=1} [A(-(-1)^k*x) - 1]^k/k ).at n=17A156909
• a(n) = Sum_{k=0..floor(3*n/5)} binomial(k+2,2) * binomial(k,3*n-5*k).at n=31A392314