111683

Appears in sequences

• Numbers k such that sigma(k+1) = 2*sigma(k).at n=23A067081
• Number of nX7 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=8A224037
• Numbers k such that the average of the divisors of k and k+1 is the same.at n=22A238380
• Number of independent vertex sets and vertex covers in the n-Sierpinski tetrahedron graph.at n=2A292697