141643

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 57 ones.at n=19A031825
• a(0)=1; a(1)=1; a(n)= a(n-1) + floor( sqrt(a(n-1)*a(n-2))+ sqrt(a(n-3)*a(n-4))+ ... ).at n=19A043327
• Number of permutations sigma of [n] such that all values k * sigma(k) for 1 <= k <= n are pairwise distinct.at n=9A333083