161773

Properties

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 61.at n=7A031649
• a(n) = prime(!n), where !n is subfactorial n.at n=6A126702
• Triangular array T read by rows: T(r,c) is the number of double permutations of the integers from 1 to r which have exactly c different values visible when viewed from the left, in the sense that a higher number hides a lower one.at n=25A309053
• Prime numbersat n=14833