a(n) = binomial(2*n, n)*2^n*|Euler(n, 1/2) - Euler(n, 0)|.
A343846
a(n) = binomial(2*n, n)*2^n*|Euler(n, 1/2) - Euler(n, 0)|.
Terms
- a(0) =0a(1) =2a(2) =6a(3) =40a(4) =350a(5) =4032a(6) =56364a(7) =933504a(8) =17824950a(9) =385848320a(10) =9334057876a(11) =249576198144
External references
- oeis: A343846