27562

Appears in sequences

• a(n+1) = a(n)+floor(a(n)/3), a(1) = 3.at n=33A100585
• Half the number of ways of placing up to n pawns on a length n chessboard row so that the row balances at its middle.at n=21A133406
• The number of ordered pairs (G,S) where G is a simple labeled graph of order n and S is a subset of the vertices of G such that every element (vertex) in S is in the same connected component of G.at n=5A249754
• a(n) = Sum_{k=1..n} k * sigma_2(k).at n=16A356125
• Expansion of Sum_{n>=1} x^(n^2)*((1+x)/(1-x))^n.at n=33A369424