39047

Properties

Appears in sequences

• First term of strong prime sextets: p(m+1)-p(m) > p(m+2)-p(m+1) > p(m+3)-p(m+2) > p(m+4)-p(m+3) > p(m+5)-p(m+4).at n=11A054813
• Primes p that have exactly three primitive roots that are not primitive roots mod p^2.at n=19A060519
• Duplicate of A075580.at n=48A077132
• Primes p such that q-p = 32, where q is the next prime after p.at n=5A126784
• Emirps of the form k^2 + k + 41.at n=32A155953
• Lexicographically largest strictly increasing sequence of primes for which the continued square root map produces Feigenbaum's constant delta = 4.6692016... (A006890).at n=30A257809
• Primes of the form 25*n^2 + 25*n + 47.at n=29A281437
• Expansion of Sum_{i>=1} mu(i)^2*x^i/(1 - x^i) / Product_{j>=1} (1 - mu(j)^2*x^j), where mu() is the Moebius function (A008683).at n=33A281572
• a(n) = 3*a(n-1) - 2*a(n-2) + 2*a(n-3) - 4*a(n-4) + 2*a(n-5), where a(0) = 2, a(1) =3, a(2) = 6, a(3)=13, a(4) = 29.at n=13A287128
• Numbers m that generate rotationally symmetrical XOR-triangles T(m) that have central triangles of zeros.at n=36A334769
• Primes p such that (p^128 + 1)/2 is prime.at n=24A341230
• Prime numbersat n=4112