124653

Appears in sequences

• Number of intersections inside an equilateral triangular figure formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. If three or more lines meet at an interior point this intersection is counted only once.at n=16A092866
• Permutations of 123456: Numbers having each of the decimal digits 1,...,6 exactly once, and no other digit.at n=11A178476