Denominator of the harmonic mean of the first n 9-gonal numbers.
A250549
Denominator of the harmonic mean of the first n 9-gonal numbers.
Terms
- a(0) =1a(1) =5a(2) =83a(3) =1945a(4) =49177a(5) =1833349a(6) =141933773a(7) =2422703191a(8) =23493728113a(9) =306193780933a(10) =920490263449
External references
- oeis: A250549