50256

Appears in sequences

• Length of list generated by n replacements of k by {-1-|k|, .., 1+|k|} with increment 2, starting with {1}.at n=8A083692
• On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that an (n,n+1) leaper reaches before getting trapped, or -1 if it never gets trapped.at n=38A343179
• Number of ordered pairs of disjoint strict integer partitions of n.at n=33A365662
• Expansion of e.g.f. 1 / (1 + 2 * log(1 - x))^2.at n=5A367474