63528

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 21.at n=11A031699
• a(n) = 441n^2 + 2n.at n=11A158321
• a(n) = (1+n)*(9 + 11*n + 4*n^2)/3.at n=35A172482
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 398", based on the 5-celled von Neumann neighborhood.at n=15A281758
• Number x = concat(MSD(x),b) such that MSD(x)*b = phi(x), where MSD(x) is the Most Significant Digit of x and phi(x) is the Euler totient function of x.at n=32A286130
• a(0) = 0, and for n > 0, (a(n)) gives the indices n for which d(n) > d(k) for k < n, where d is the difference sequence of (cos k + sin k).at n=19A299639