40025

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 16.at n=25A031694
• Primitive sliding numbers (excludes multiples of 10): totals, including repetitions, of sums r + s, r >= s, such that 1/r + 1/s = (r + s)/10^k for some k >= 0.at n=39A103184
• a(n) = A064688(n) - 1.at n=20A123557
• a(n) = 625*n^2 + 25.at n=7A157915
• Number of Dyck paths of semilength n such that the maximal number of peaks per level equals four.at n=8A288745