304400

Appears in sequences

• Number of paraffins (see Losanitsch reference for precise definition).at n=38A006010
• Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 13.at n=9A154089
• The sum of the numbers of the central diamond of the multiplication table [1..k] X [1..k] for k=2*n-1.at n=19A357042