344350

Appears in sequences

• Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 1 and t = 1234.at n=9A324132
• a(n) = number of subsets of {1, 2, ..., n} that represent the first k divisors of m for some positive integers m and 1 <= k <= A000005(m).at n=45A378314