29544

Appears in sequences

• Number of lines through at least 2 points of an n X n grid of points.at n=19A018808
• Numbers k such that 243*2^k+1 is prime.at n=25A032498
• Triangle read by rows: T(n,k) is the number of binary trees (i.e., a rooted tree where each vertex has either 0, 1, or 2 children; and, when only one child is present, it is either a right child or a left child) with n edges and k pairs of adjacent vertices of outdegree 2.at n=42A126219
• First differences (A131771) equal this sequence with terms repeated at positions: {m*(m+1)/2, m>=0}.at n=28A131770
• First differences (A131772) equal this sequence with zeros inserted at positions {m*(m+1)/2, m>=0}.at n=35A131771
• Partial sums (A131771) equal this sequence excluding zeros located at positions {m*(m+1)/2, m>=0}, with a(0)=1.at n=42A131772
• a(n) = A131770( n*(n+1)/2 ) for n>=0.at n=7A131785
• The number of ordered trees with bicolored single edges on the boundary.at n=9A228343