593191

Appears in sequences

• Numerators of continued fraction convergents to sqrt(644).at n=10A042236
• a(n) = least natural number k such that f(k) begins a maximal zigzag of length n in the prime gaps function f(x) = p(x+1)-p(x), where p(x) denotes the x-th prime. (Cf. A066485.)at n=22A066918