166825

Appears in sequences

• 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 42.at n=11A031630
• E.g.f.: A(x) = Sum_{n>=0} exp( n*(n-1)/2 * x ) * x^n / n!.at n=8A135742
• Expansion of e.g.f. Product_{k>=1} (1 + (exp(x) - 1)^(k^2)).at n=8A306083