661329

Appears in sequences

• Number T(n,k) of labeled cyclic 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=49A324429
• Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals four.at n=5A324448
• a(n)/2^(n-1) is the expected win if one of two baskets is chosen randomly and the player optimally chooses the coins with values from 1 to n (see Comments for details).at n=13A391791