28818

Appears in sequences

• Number of permutations in S_{n+2} containing an increasing subsequence of length n.at n=15A217200
• Number of rooted gene trees with n leaves on the label set [4].at n=5A220824
• Numbers x such that the base 10 representation of x^2 forms an arithmetic sequence when split into equal-sized chunks.at n=9A244660
• Array read by antidiagonals: T(n,k) is the number of series-reduced rooted trees with n leaves of k colors.at n=41A319254
• Number of endless self-avoiding walks of length 2*n for the honeycomb lattice.at n=8A334330