42407

Properties

Appears in sequences

• Primes p whose period of reciprocal equals (p-1)/7.at n=31A056212
• Lower twin primes with lower twin prime index.at n=27A088460
• Primes of the Form : p1=a*b+c;p2=a*c+b;p3=b*c+a;p=(p1+p2+p3)/2; p1,p2 and p3 are three consecutive prime numbers.at n=8A157722
• Initial members of prime quadruples (n, n+2, n+54, n+56).at n=33A248661
• Septic artiads: primes p congruent to 1 mod 14 for which all solutions of the congruence x^3 + x^2 - 2x - 1 == 0 (mod p) are 7th power residues.at n=8A270800
• Records in A039654.at n=20A292112
• Regular triangle where T(n,k) is the number of non-isomorphic multiset partitions of weight n with k connected components.at n=56A321194
• Interlopers in sexy prime quadruples.at n=32A358322
• Prime numbers preceded by two consecutive numbers which are products of four distinct primes (or tetraprimes).at n=15A361796
• Prime numbersat n=4434