589250domain: NAppears in sequencesExpansion of (2 + x + x^2)/((1 - x)*(1 - x - x^2)).at n=24A026390Numbers 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 49.at n=28A031637Diagonal sums of the triangle A132047.at n=26A144707