80834386026domain: NAppears in sequencesa(n) = Sum_{i=0..2n} B(i)*C(2n+1,i)*5^i where B(i) are the Bernoulli numbers, C(2n,i) the binomial numbers.at n=6A069852a(n) = Sum_{k=0,n-1} 5^k*B(k)*binomial(n,k) where B(k) is the k-th Bernoulli number.at n=15A083009Numerator of Bernoulli(n, 1/5).at n=15A157866