468809

Appears in sequences

• Numbers k such that 3*phi(k) = 2*sigma(k).at n=9A065818
• Expansion of (1-x)^2*(1-3*x)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).at n=10A220948
• The growth series for the affine Weyl group E_7.at n=20A266785