203651

Appears in sequences

• a(n) = (A114043(n) - 1)/2.at n=33A115005
• Number of independent generators of degree n of the algebra of Free quasi-symmetric functions (or Malvenuto-Reutenauer algebra of permutations) as a dendriform dialgebra (i.e., number of totally primitive elements).at n=8A122827
• a(n) = Sum_{k=0..n} k*binomial(n-k, 2*k).at n=21A136444
• Main diagonal of A332369.at n=32A332370