900921

Appears in sequences

• a(n) = (-1)^(n+1)/3/(2n+1) * Sum_{k=0..n} 16^k*B(2k)*C(2n+1,2k) where B(k) denotes the k-th Bernoulli number.at n=5A076552
• Starts of runs of 3 consecutive lazy-Lucas-Niven numbers (A351719).at n=3A351721