Denominators of squares of harmonic numbers A001008/A002805.

A103931

Denominators of squares of harmonic numbers A001008/A002805.

Terms

    a(0) =1a(1) =4a(2) =36a(3) =144a(4) =3600a(5) =400a(6) =19600a(7) =78400a(8) =6350400a(9) =6350400a(10) =768398400a(11) =768398400a(12) =129859329600a(13) =129859329600a(14) =129859329600a(15) =519437318400

External references