a(n) = Sum_{k=0..n} (-2)^(3*k)*binomial(2*n, 2*k)*Euler(2*k, 1/2). Row sums of A371637.
A371683
a(n) = Sum_{k=0..n} (-2)^(3*k)*binomial(2*n, 2*k)*Euler(2*k, 1/2). Row sums of A371637.
Terms
- a(0) =1a(1) =3a(2) =33a(3) =819a(4) =37281a(5) =2720643a(6) =291107457a(7) =42945429747
External references
- oeis: A371683