530656

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<=2z.at n=31A212507
• Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w=R, x=R, y=R, z<R, where R = max{w,x,y,z} - min{w,x,y,z}.at n=30A212751
• Number of 3-connected Schnyder labelings with n inner faces in the quadrangular dissection.at n=15A377920