2476656

Appears in sequences

• Theta series of A_8 lattice.at n=30A008448
• Numbers k such that sigma(tau(k)) = rad(k).at n=19A173582
• Jordan function ratio J_6(n)/J_2(n).at n=35A194532
• Define b(n) by 1/sm(w) = Sum_{n >= 0} b(3*n-1)*w^(3*n-1), where sm(w) is the elliptic function defined in A104133; a(n) = denominator of b(3*n-1).at n=4A335158
• a(n) = n^2*sigma_2(n).at n=36A386745