131560

Appears in sequences

• From the enumeration of corners.at n=11A006332
• Convolution of A008805 (triangular numbers repeated) with itself.at n=43A177747
• Number of ways 2*n-1 people can vote on three candidates so that the Condorcet paradox arises.at n=22A277935
• a(n) = 3*binomial(4*n,n)/(4*n-1).at n=6A337291