31754

Appears in sequences

• Number of 2n-step polygons on cubic lattice.at n=6A001409
• Number of simple graphs g on n nodes with |Aut(g)| = 4.at n=8A075096
• Numbers whose Matula tree is a binary tree (i.e., root has degree 2 and all nodes except root and leaves have degree 3).at n=18A111299
• Triangle read by rows: row n>=1 contains in increasing order the Matula numbers of the rooted binary trees with n leaves.at n=19A245824
• Matula-Goebel number of the rooted binary tree with Colijn-Plazzotta number n.at n=22A356121