199247

Properties

Appears in sequences

• Triangle T(n,k) of the number of unlabeled graphs on n nodes with universal reconstruction number k, 3<=k<=n. URN(G) is the minimum size for which all multisubsets of vertex-deleted subgraphs of G can uniquely reconstruct G up to isomorphism.at n=22A124003
• Primes p such that p^2 +- 12 and p^2 +- 18 are also primes.at n=15A153121
• Primes of the form 42*k^3 + 270*k^2 - 26436*k + 250703 in order of increasing k.at n=2A271144
• Emirps p such that both p and its reversal are sums of three consecutive primes.at n=35A345472
• First of four consecutive primes p,q,r,s such that (2*p+q)/5 and (r+2*s)/5 are prime.at n=17A358149
• Prime numbersat n=17922