Numerator of the harmonic mean of the first n hexagonal numbers.

A250344

Numerator of the harmonic mean of the first n hexagonal numbers.

Terms

    a(0) =1a(1) =12a(2) =90a(3) =1680a(4) =6300a(5) =83160a(6) =1261260a(7) =576576a(8) =11027016a(9) =1163962800a(10) =1280359080a(11) =32125373280a(12) =174012438600a(13) =80313433200

External references