24461

Appears in sequences

• a(n) = (5*n + 1)^2 + 4*n + 1.at n=31A007533
• Number of ordered quadruples of integers from [ 2,n ] with no global factor.at n=26A015638
• Numerators of continued fraction convergents to sqrt(115).at n=11A041208
• Number of A095282-primes in range ]2^n,2^(n+1)].at n=19A095292
• Maximum possible number of subtrees of an n-node unrooted tree in which each node has maximum degree three (equivalently, rooted binary trees in which some internal nodes may have only one child). A subtree is a nonempty contiguous set of nodes, not necessarily including all descendants of the root.at n=22A124454
• a(n) = 25*n^2 - 36*n + 13.at n=32A154355
• Numbers k such that both k and k+2 are de Polignac numbers (A006285).at n=37A330284
• Numbers k such that k and k+2 are both A000120-perfect numbers (A175522).at n=30A360639