22972950

Appears in sequences

• Indices of Bernoulli numbers of the form 4k+2 whose fractional part is < 2/3.at n=9A155125
• Number T(n,k) of linear chord diagrams having n chords and maximal chord length k (or k=0 if n=0); triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=54A293961
• Number of linear chord diagrams having n chords and maximal chord length n, a(0)=1.at n=9A293962