29689

Appears in sequences

• Third column sequence of unsigned triangle A056588.at n=9A056589
• Number of different hierarchical orderings that can be formed from n unlabeled elements with no repetition of subhierarchies.at n=13A098407
• Number of solutions to a+b+c < d+e with each of a,b,c,d,e in {1..n+1}.at n=9A179441
• Difference between sum of largest parts and sum of smallest parts of all partitions of n into an odd number of parts.at n=31A211870
• Number of nondecreasing -n..n vectors of length 3 whose dot product with some lexicographically greater than or equal to nondecreasing -n..n vector equals 3.at n=30A226424
• G.f.: (1-x)*(1-x-2*x^2-sqrt(1-2*x-3*x^2))/(2*x*(1-2*x-x^2)).at n=12A234270