484180

Appears in sequences

• Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 1 (mod n), with x() in 0..n-1.at n=9A180807
• Number T(n,k) of linear chord diagrams having n chords and minimal chord length k (or k=0 if n=0); triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=38A293881
• Number of linear chord diagrams having n chords and minimal chord length two.at n=6A293915