22463

Appears in sequences

• Coordination sequence for MgNi2, Position Ni3.at n=37A009934
• Number of solutions to c(1)*prime(3) + ... + c(n)*prime(n+2) = 0, where c(i) = +-1 for i>1, c(1) = 1.at n=23A022900
• Numbers m such that pi(m^2) is a square.at n=10A064523
• 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=16A111299
• Triangle read by rows: T(n,k) is the number of n-tuples with sum k + n whose i-th element is a positive integer <= prime(i), 0 <= k < A070826(n).at n=65A239738
• Triangle read by rows: row n>=1 contains in increasing order the Matula numbers of the rooted binary trees with n leaves.at n=17A245824
• First occurrence of 2*n in A035096.at n=48A247234
• Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = e/2.at n=29A279591
• Matula-Goebel numbers of rooted trees in which all positive outdegrees are the same.at n=47A298424
• Matula-Goebel number of the rooted binary tree with Colijn-Plazzotta number n.at n=30A356121