266797

Properties

Appears in sequences

• a(n) = Catalan(n) + Catalan(n+1) - 1.at n=11A000778
• Primes of the form 5n^2 - 8.at n=18A201789
• First of four consecutive primes p,q,r,s such that q*s - p*r is a square.at n=21A358922
• Prime numbersat n=23374