118864

Appears in sequences

• Hankel transform of A047098.at n=4A127635
• Integral factorial ratio sequence: a(n) = (2*n)!*(8*n)!/(n!*(4*n)!*(5*n)!).at n=3A182400
• Number of pairs of intersecting diagonals in the exterior of a regular n-gon.at n=35A211381
• Centered triangular numbers that are pseudoperfect (semiperfect).at n=19A377747
• Number of tetrahedra in the n X n queen graph.at n=16A388998