53591

Properties

Appears in sequences

• [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 3}.at n=21A024223
• Let (p1,p2), (p3,p4) be pairs of twin primes with p1*p2=p3+p4-1; sequence gives values of p1.at n=33A047976
• Primes p of the form k*(k + 1) - 1 such that p and p + 2 are twin primes.at n=30A088486
• G.f.: x^2/((1-x^2)^2*Product_{i>0}(1-x^i)).at n=32A103650
• Primes of the form ((p+1)/2)^2+((p-1)/2), where p is prime.at n=37A163419
• Number of length 1+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=33A248538
• Prime numbersat n=5459