113904

Appears in sequences

• Numbers k such that sigma(prime(k) - 1) == 0 (mod k).at n=43A067758
• Arises in enumerating Huffman codes, compact trees, and sums of unit fractions.at n=19A194628
• Number of n-step self-avoiding walks on a 2D square lattice where the first visited lattice point is directly visible from the last visited lattice point, and were both the visited lattice points and the path between these points are considered when determining the visibility of points.at n=11A358036
• Numbers k such that d(k) > d(k+1) > d(k+2) > d(k+3) > d(k+4), where d(n) is the number of divisors of n.at n=16A364720
• Expansion of e.g.f. (1/x) * Series_Reversion( x * (1 - x)^3 * exp(x) ).at n=5A377861