298154

Appears in sequences

• 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=34A111299
• Triangle read by rows: row n>=1 contains in increasing order the Matula numbers of the rooted binary trees with n leaves.at n=24A245824
• Matula-Goebel numbers of unlabeled binary rooted semi-identity trees.at n=18A339193
• a(1) = 1 and thereafter a(n) = 2*prime(a(n-1)).at n=6A352289