-5304

Appears in sequences

• Expansion of (1-4*x)^(17/2).at n=11A020929
• Riordan array (1/(1+2xc(-2x)),xc(-2x)/(1+2xc(-2x))), c(x) the g.f. of A000108.at n=51A114193
• a(n) = Sum_{k=0..n} binomial(n+k,k)*sin(Pi*(n+k)/2).at n=8A181933
• Triangle read by rows: T(n,m) = (m/(n-m))*Sum_{k=1..n-m}((-1)^k*binomial(m-1,k-1)*binomial(3*(n-m)-k-1,n-m-k)), T(n,n)=1.at n=37A271460
• Triangle read by rows: T(n,m) = (m/(n-m))*Sum_{k=1..n-m}((-1)^k*binomial(m-1,k-1)*binomial(3*(n-m)-k-1,n-m-k)), T(n,n)=1.at n=47A271460
• Expansion of Sum_{k>0} x^(3*k)/(1+x^k)^4.at n=33A363617