64758

Appears in sequences

• Binomial transform of [1, 5, 10, 10, 5, 1, 1, -1, 1, -1, 1, ...].at n=20A140228
• Equals two maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 2 X n array.at n=13A220407
• Number of unlabeled rooted phylogenetic trees with n (leaf-) nodes such that for each inner node all children are either leaves or roots of distinct subtrees.at n=15A300660
• Expansion of Product_{k>=1} 1/(1 - x^k)^(d(k)-1), where d(k) = number of divisors of k (A000005).at n=38A318783