a(n) = (1/(8*n)) * Sum_{d|n} mu(n/d) * binomial(8*d,d).

A346582

a(n) = (1/(8*n)) * Sum_{d|n} mu(n/d) * binomial(8*d,d).

Terms

    a(0) =1a(1) =7a(2) =84a(3) =1120a(4) =16450a(5) =255612a(6) =4141382a(7) =69158272a(8) =1182125043a(9) =20581143150a(10) =363704640475

External references