146412

Appears in sequences

• Numbers n such that sigma(n) is congruent to n mod phi(n).at n=24A066679
• Triangle read by rows, matrix inverse of [x^(n-k)](skp(n,x)-skp(n,x-1)+x^n) where skp denotes the Swiss-Knife polynomials A153641.at n=48A214622
• Number of self-avoiding walks in the n X 2 grid graph which start at any of the n vertices on left side of the graph and terminate at any of the n vertices on the right side.at n=13A333510
• Numbers k that have at least two different representations as the product of a number and of its decimal digits.at n=35A336944
• Number of grains of sand required to be added to one cell at the origin in an initially empty and infinite 3D cubic grid for the 3D sandpile model such that the distance from the origin of the furthest nonempty cell along the axes is n.at n=22A351783