a(n) = Sum_{d|n} mu(n/d) * binomial(6*d,d) / (5*d+1).
A346937
a(n) = Sum_{d|n} mu(n/d) * binomial(6*d,d) / (5*d+1).
Terms
- a(0) =1a(1) =5a(2) =50a(3) =500a(4) =5480a(5) =62776a(6) =749397a(7) =9203128a(8) =115607259a(9) =1478308780a(10) =19180049927a(11) =251857056364
External references
- oeis: A346937