246715

Appears in sequences

• Number of primitive (aperiodic) palindromic structures using exactly five different symbols.at n=21A056484
• Number of n X 1 0..3 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.at n=11A268419
• a(n) is the sum of all products of pairs of numbers joined by the diagonals of an n-gon when its vertices are numbered from 1 to n in order.at n=37A337130