-809
domain: Z
Appears in sequences
- Numerators of column 2 of table described in A051714/A051715.at n=14A051718
- a(n) = Sum_{k=0..n-1} 3^k*B(k)*C(n,k) where B(k) is the k-th Bernoulli number and C(n,k)=binomial(n,k).at n=9A083007
- a(n) = -a(n-2) + 2*a(n-4) - a(n-10).at n=21A089135
- Numerator of Bernoulli(n, 1/3).at n=9A157799
- Values of n such that L(10) and N(10) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=6A227448
- Triangle read by rows T(n, k) = Sum_{h>=0} Bernoulli(h)*binomial(n, h)*Stirling2(n-h, k)*k^h for n>=1 and 1<=k<=n.at n=38A339208
- Expansion of 1 / Sum_{k in Z} x^(3*k) / (1 - x^(5*k+1)).at n=42A375064