226765

Appears in sequences

• Triangle T(n,k) read by rows: the coefficient [x^k] of the series (1-x)^(2n-1)*Sum_{l>=0} A001263(n+3*l,3*l+1)*x^l, in row n>=1 with exponents k>=0.at n=28A178658
• Numerator of n*Product_{j=1..n-1} ((3*j + 1)/(3*j + 2)).at n=10A271921