Denominator of the harmonic mean of the first n pentagonal numbers.
A250328
Denominator of the harmonic mean of the first n pentagonal numbers.
Terms
- a(0) =1a(1) =3a(2) =77a(3) =877a(4) =6271a(5) =36049a(6) =36423a(7) =422137a(8) =49691099a(9) =1448086909a(10) =11631128477a(11) =2334008785a(12) =44471893747a(14) =832564679309
External references
- oeis: A250328