296643390

Appears in sequences

• Kendall-Mann numbers: the most common number of inversions in a permutation on n letters is floor(n*(n-1)/4); a(n) is the number of permutations with this many inversions.at n=12A000140
• a(n) is the number of permutations of [1..n] that have the same number of inversions as non-inversions.at n=13A316775