137201

Properties

Appears in sequences

• Primes which can be expressed as sum of distinct powers of 7.at n=7A077721
• Primes of the form 2^a * 5^b * 7^c + 1 for positive a, b, c.at n=19A114992
• Primes of the form 8k+1 generated recursively. Initial prime is 17. General term is a(n)=Min {p is prime; p divides (2Q)^4 + 1}, where Q is the product of previous terms in the sequence.at n=12A125039
• Primes of the form 7n^2 + 1.at n=31A201602
• a(0) = 16, after which, if (2*a(n-1)) - 1 = product_{k >= 1} (p_k)^(c_k) then a(n) = product_{k >= 1} (p_{k-1})^(c_k), where p_k indicates the k-th prime, A000040(k).at n=30A246345
• a(n)/A002939(n+1) is the Kirchhoff index of the disjoint union of two complete graphs each on n and n+1 vertices with the empty graph on n+1 vertices.at n=19A338588
• Prime numbersat n=12776