a(n) = n! * 2^(-n) * binomial(3*n - 1, 2*n) * binomial(2*n, n). Central terms of the Bessel triangle A132062.
A376872
a(n) = n! * 2^(-n) * binomial(3*n - 1, 2*n) * binomial(2*n, n). Central terms of the Bessel triangle A132062.
Terms
- a(0) =1a(1) =1a(2) =15a(3) =420a(4) =17325a(5) =945945a(6) =64324260a(7) =5237832600a(8) =496939367925
External references
- oeis: A376872