4420321081

Appears in sequences

• Number of permutations of 3 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1.at n=7A190826
• Number of permutations of n copies of 1..7 introduced in order 1..7 with no element equal to another within a distance of 1.at n=2A190927
• 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=38A322013