1837836

Appears in sequences

• a(n) = 42*binomial(n,10).at n=18A088626
• G.f. A(x) satisfies A097191(x*A(x)) = A(x) and so equals the ratio of the g.f.s of any two adjacent diagonals of triangle A097190.at n=5A097193
• Lower triangular array called S2hat(-3) related to partition number array A144279.at n=29A144280
• Second column (m=2) of triangle S2hat(-3) = A144280.at n=6A144282
• Triangle read by rows: T(n,k) = binomial(2*n,2*k)*binomial(2*n-2*k,n-k)/(n+1-k) for 0<=k<=n.at n=49A280580