24631

Properties

Appears in sequences

• Wedderburn-Etherington numbers: unlabeled binary rooted trees (every node has outdegree 0 or 2) with n endpoints (and 2n-1 nodes in all).at n=17A001190
• Number of n-node rooted unlabeled trees with outdegree <= 2 and exactly 1 edge at the root.at n=17A036656
• Largest prime below prime(n)^2 (A001248).at n=36A054270
• Records in A079369.at n=12A079370
• Primes p such that q-p = 28, where q is the next prime after p.at n=21A124595
• Prime Wedderburn-Etherington numbers.at n=6A136402
• Prime numbers such that the sum of any 2 or 4 consecutive terms are averages of twin prime pairs and sum of any 3 or 5 consecutive terms are primes.at n=9A153128
• Primes p of the form : p+p^2+p^3-+4=prime.at n=8A154822
• Primes p such that both 2p-1 and 2p^2-2p+1 are prime.at n=27A274609
• Number of subsets of {1..n} whose elements have the same number of divisors.at n=42A339514
• Number of rooted binary trees (in which all inner nodes have precisely two children) with n leaves and with maximal number of cherries (i.e., maximal number of pendant subtrees with two leaves).at n=33A344613
• a(n) is the smallest prime p such that there are n numbers between p and nextprime(p) which are not prime powers.at n=26A368749
• Prime numbersat n=2729