2333606221

Appears in sequences

• Number of compositions of 3n in which the minimal multiplicity of parts equals n.at n=17A244174
• a(n) = binomial(2*n-2, n-1) + (-1)^n.at n=17A286033
• a(n) = binomial(2*(n - 1), n - 1) + 1.at n=18A323230