a(n) = (1/n)*Sum_{k=1..n} F(4*k)*B(2*n-2*k)*binomial(2*n,2*k), where F are Fibonacci numbers and B are Bernoulli numbers.
A111262
a(n) = (1/n)*Sum_{k=1..n} F(4*k)*B(2*n-2*k)*binomial(2*n,2*k), where F are Fibonacci numbers and B are Bernoulli numbers.
Terms
- a(0) =3a(1) =12a(2) =65a(3) =403a(4) =2652a(5) =17889a(6) =121859a(7) =833260a(8) =5706081a(9) =39096531a(10) =267936188a(11) =1836369217a(12) =12586419075a(13) =86267964108a(14) =591287758337
External references
- oeis: A111262