57113

Appears in sequences

• Let phi = arccos(1/3), the dihedral angle of the regular tetrahedron. Then cos(n*phi) = a(n)/3^n.at n=10A025172
• Expansion of (1 - x)/(1 - 2*x + 3*x^2) in powers of x.at n=20A087455
• Numbers that are the sum of four third powers in nine or more ways.at n=20A345146
• Numbers that are the sum of four third powers in exactly nine ways.at n=11A345154