101676domain: NAppears in sequences15-gonal (or pentadecagonal) pyramidal numbers: a(n) = n*(n+1)*(13*n-10)/6.at n=36A177890The number of grains of sand in the identity element for the 3D sandpile group on an n X n X n cubic grid.at n=29A351379Number of integer partitions of n whose multiplicities have integer median.at n=46A360687