199807

Properties

Appears in sequences

• Lesser of a pair (p,p+4) of cousin primes whose arithmetic mean p+2 is a square number.at n=13A176130
• Primes of the form 9n^2 - 2.at n=30A201860
• Prime p such that sqrt(p+2) is semiprime (A001358).at n=37A257933
• a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2*n-6*k,2*k).at n=18A387623
• Prime numbersat n=17969