181888

Appears in sequences

• Number of labeled trees with 2-colored leaves.at n=7A038054
• a(n) contains n digits (either '1' or '8') and is divisible by 2^n.at n=5A053376
• a(n) = Sum_{k=1..n} k^5 * binomial(n,k).at n=6A059338
• Number of free poly-IH13-tiles (holes allowed) with n cells.at n=9A197959
• Triangle read by rows. T(n, k) = Sum_{j=0..n-k} binomial(-n, j) * A268437(n - k, j).at n=31A357339