38381

Appears in sequences

• E.g.f.: 1 - exp((-1 + sqrt(5 - 4*exp(x)) )/2).at n=6A118794
• Semiprimes formed by concatenating n, n, and 1 for n = 1, 2, 3,....at n=16A210711
• Expansion of Product_{k>=1} (1 + x^(2*k+1))^k.at n=51A263149
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 379", based on the 5-celled von Neumann neighborhood.at n=37A271537
• Number of vertices formed when connecting all 4n points on the perimeter of an n X n square by infinite lines.at n=8A345649