1474050783

Appears in sequences

• Number of sequences with 5 copies each of 1,2,...,n avoiding the pattern 12...n.at n=4A269115
• Number of sequences with n copies each of 1,2,3,4 avoiding the pattern 1234.at n=5A269122
• Number A(n,k) of sequences with k copies each of 1,2,...,n avoiding the pattern 12...n; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=49A269129