116129

Appears in sequences

• Expansion of Product_{m>=1} (1+q^m)^(-13).at n=10A022608
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 29.at n=13A031617
• Numbers n such that sigma(sigma(n) - phi(n)) = phi(sigma(n) + phi(n)).at n=13A074876
• E.g.f. A(x) satisfies: A(x*cos(x)) = 1/cos(x).at n=4A196873