Numerator of the harmonic mean of the first n heptagonal numbers.
A250345
Numerator of the harmonic mean of the first n heptagonal numbers.
Terms
- a(0) =1a(1) =7a(2) =378a(3) =4284a(4) =294525a(5) =3180870a(6) =59376240a(7) =2510766720a(8) =2824612560a(9) =147507544800
External references
- oeis: A250345