206081

Properties

Appears in sequences

• Let (p1,p2), (p3,p4) be pairs of twin primes with p1*p2=p3+p4-1; sequence gives values of p3.at n=5A047978
• Numbers k such that 11^k - 10^k is prime.at n=10A062577
• Smaller member of a twin prime pair with a square sum.at n=18A069496
• Primes equal to a product of twin primes minus 1 divided by 2.at n=10A086870
• Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = 2 is solvable.at n=6A102266
• Define a(0)=3; then a(n)=k*a(n-1)^2-1=least prime first of twin primes.at n=2A112879
• (Product of twin primes - 1)/2.at n=28A120876
• 128n^2 + 2336n + 10657.at n=30A157433
• a(n) = 2048n^2 + 128n + 1.at n=9A157476
• Twin prime pairs which sum to perfect squares.at n=36A232878
• Smaller member of a twin prime pair with a perfect power sum.at n=21A270231
• Numbers m such that each of the four consecutive integers m, m+1, m+2, m+3 has squarefree rank 1.at n=8A290340
• Numbers k such that A155085(k) is in A037074.at n=24A352616
• Prime numbersat n=18474