Denominator of the harmonic mean of the first n nonzero octagonal numbers.

A250401

Denominator of the harmonic mean of the first n nonzero octagonal numbers.

Terms

    a(0) =1a(1) =9a(2) =197a(3) =503a(4) =6623a(5) =17813a(6) =340527a(7) =3763087a(8) =169947523a(9) =170436583a(10) =5295982873a(11) =90208585541

External references