38890

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 43.at n=3A031631
• Number of zeros in numbers 0 to 999..9 (n digits).at n=4A033714
• Number of permutations on {1,...,n} containing any given pattern alpha in the symmetric group S_3.at n=7A056986
• Number of labeled commutative monoids of order n with a fixed identity.at n=5A058156
• Number of permutations T(n,k) in S_n containing an increasing subsequence of length k; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=30A214152
• Main diagonal of array in A358304, divided by 2.at n=45A358307