351574834

Appears in sequences

• Number of permutations of 6 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1.at n=4A190835
• Number of permutations of n copies of 1..4 introduced in order 1..4 with no element equal to another within a distance of 1.at n=5A190918
• Number of nX1 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or two horizontal or vertical neighbors.at n=23A199194
• Square array A(n,k), n >= 1, k >= 1, read by antidiagonals, where A(n,k) is the number of permutations of n copies of 1..k introduced in order 1..k with no element equal to another within a distance of 1.at n=41A322013