41765

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 13.at n=35A031601
• Numbers whose set of base-14 digits is {1,3}.at n=35A032921
• Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 19.at n=25A051984
• a(1)=1, a(n)=a(n-1)+n^2 if n odd, a(n)=a(n-1)+ n^5 if n is even.at n=8A140151
• a(n) = Sum_{k=1..n} k^2*tau(k), where tau is A000005.at n=29A319085