334791

Appears in sequences

• Expansion of 1/((1-x)*(1-5*x)*(1-7*x)*(1-8*x)).at n=5A022452
• a(n) is the number of central ideals of a garland of order 2n, i.e., a(n) = g(2n,n), where g(n,k) is the number of ideals of size k in a garland (or double fence) of order n (see A137278).at n=17A136029