192509

Appears in sequences

• Strong Lucas pseudoprimes.at n=23A217255
• Numbers of the form p*q, p and q prime with q=2p-3.at n=33A226755
• a(n) = Sum_{k=0..floor(n/6)} (-1)^k * (7*k+1) * binomial(2*n-5*k+1,n-6*k)/(2*n-5*k+1).at n=12A390477