965770domain: NAppears in sequencesa(n) = (5*n + 9)*binomial(n+8, 8)/9.at n=12A055844Denominator of 1 - Sum_{i=1..n} |Bernoulli(i)|.at n=24A100652Denominator of 1 - Sum_{i=1..n} |Bernoulli(i)|.at n=25A100652a(n) = product of primes p such that p^k <= n < 2*p^k for some k >= 1.at n=25A366369