238919

Properties

Appears in sequences

• Smallest k such that k*2*p(n)^2+1=q is prime, k*2*q^2+1=r, k*2*r^2+1=s, k*2*r^2+1=t, r, s, and t are also prime.at n=17A224496
• Number of (n+6)X11 0..1 matrices with each 7X7 subblock idempotent.at n=17A224585
• For n >= 1, a(n) is the least prime p such that the arithmetic mean of (n + 1) consecutive primes starting with p is a perfect square, or a(n) = -1 if no such p exists.at n=29A365706
• Prime numbersat n=21136