405337domain: NAppears in sequencesNumbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 43.at n=29A031631a(n) = Sum_{k=0..n} k*A000009(k).at n=42A270105q-Expansion of wedge character chi^(2)(q).at n=30A288578