554268

Appears in sequences

• Expansion of 1/(1-4*x)^(9/2).at n=6A020920
• Expansion of (1-4*x)^(19/2).at n=6A020931
• Number of diagonal dissections of an n-gon into 5 regions.at n=10A033277
• Triangle read by rows: T(n,m) = C[n,m,m] where C[i,j,k] is the 3-dimensional Catalan pyramid defined by C[0,0,0]=1 and C[i,j,k]=0 if j>i or k>j and C[i,j,k]=C[i-1,j,k]+C[i,j-1,k]+C[i,j,k-1].at n=34A065077
• a(n) = lcm{1, 2, ..., n}/(n*(n-1)), n >= 2.at n=19A099946
• a(n) = number of standard Young tableaux of type (n,n-1,n-1).at n=6A123691
• Central coefficients of the triangle A132047.at n=10A144706
• Degrees of irreducible representations of twisted simple Chevalley group 2E6(2).at n=3A214478
• a(n) = - 12*a(n-1) - 54*a(n-2) - 112*a(n-3) - 105*a(n-4) -36*a(n-5) - 2*a(n-6), with a(0)=3, a(1)=-6, a(2)=18, a(3)=-60, a(4)=210, a(5)=-756.at n=10A215635
• a(n) = A003418(n)/A000793(n).at n=19A225558
• a(n) = A003418(n)/A000793(n).at n=20A225558
• a(n) = A003418(n)/A000793(n).at n=21A225558
• a(n) = A003418(n)/A000793(n).at n=22A225558
• Denominator of 2*Sum_{k=0..n} binomial(n,k)^2*binomial(n+k,k)^2*(H(n+k)-H(n-k)) where H(n) = Sum_{k=1..n} 1/k.at n=21A334887
• Denominator of 2*Sum_{k=0..n} binomial(n,k)^2*binomial(n+k,k)^2*(H(n+k)-H(n-k)) where H(n) = Sum_{k=1..n} 1/k.at n=22A334887
• Square array read by ascending antidiagonals: T(n,k) = [x^(3*k)] ( (1 + x)^(n+3)/(1 - x)^(n-3) )^k for n, k >= 0.at n=47A364519