93120

Appears in sequences

• Triangle read by rows: T(n,k) is the number of chiral pairs of rows of n colors with exactly k different colors.at n=39A305622
• Number of chiral pairs of rows of n colors with exactly 4 different colors.at n=8A305624
• a(n) = n! * Sum_{k=0..floor(n/2)} 1/binomial(n-k, k).at n=8A358446
• a(n) is the number of 2 X 2 matrices over the integers mod n that are invertible mod n for every permutation of their elements.at n=24A367926