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).
A083007
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).
Terms
- a(0) =0a(1) =1a(2) =-2a(3) =1a(4) =4a(5) =-5a(6) =-26a(7) =49a(8) =328a(9) =-809a(10) =-6710a(11) =20317a(12) =201772a(13) =-722813a(14) =-8370194a(15) =34607305a(16) =457941136a(17) =-2145998417a(18) =-31945440878a(19) =167317266613
External references
- oeis: A083007