a(n) = Sum_{d|n} mu(n/d) * binomial(8*d,d) / (7*d+1).
A346939
a(n) = Sum_{d|n} mu(n/d) * binomial(8*d,d) / (7*d+1).
Terms
- a(0) =1a(1) =7a(2) =91a(3) =1232a(4) =18277a(5) =285285a(6) =4638347a(7) =77650784a(8) =1329890613a(9) =23190011435a(10) =410333440535
External references
- oeis: A346939