2679136

Appears in sequences

• Number of 6-ary rooted trees with n nodes and height exactly 8.at n=20A036646
• a(n) is the number of decompositions of F(n,1) into disjoint unions of F(j,k) and G(q,r) where F(j,k) is the set of numbers { i*k, 0 <= i <= j } and where G(q,r) is the set of numbers { (2*p-1)*r, 1 <= p <= q }.at n=40A335631