72936

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 15.at n=19A031693
• Similar to A137284, but considering Sum{ k = 1,2,3,... } 5^(-nk).at n=29A136275
• a(n) = 225n^2 + 2n.at n=17A158228
• a(n) = 12*n^3 + 9*n^2 + 2*n.at n=18A191745
• Expansion of 1/( 1 - Sum_{k>=0} x^(6^k) / (1 - x^(6^k)) ).at n=17A382378