a(n) = binomial(binomial(binomial(n, 2), 3), 4)/5.

A175991

a(n) = binomial(binomial(binomial(n, 2), 3), 4)/5.

Terms

    a(0) =969a(1) =1642914a(2) =352470391a(3) =25957590316a(4) =958073067315

External references