32409

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 40.at n=8A031718
• Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing.at n=40A107262
• a(n) = 81*n^2 + 9.at n=19A157888
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 478", based on the 5-celled von Neumann neighborhood.at n=41A272453