2390653domain: NPropertiesPrimalityPrimeyesAppears in sequencesCenturies whose prime pattern is the same as prime pattern in the previous century.at n=8A219996a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(2*n-3*k,n-2*k).at n=12A360211Prime numbersat n=175665