64919

Properties

Appears in sequences

• First term of weak prime sextet: 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=19A054828
• First term of weak prime septet: 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) < p(m+6)-p(m+5).at n=1A054834
• Primes in A152535.at n=36A152563
• Number of compositions of n with some part repeated.at n=17A261982
• Lesser of twin primes P(k) and P(k+1) such that Sd(P(k)) + Sd(P(k+1)) = Sd(k) + Sd(k+1), where Sd(x) is the sum of digits of x.at n=12A277111
• a(n) is the least integer k such that k*prime(n) is in A346113, or 0 if no such k exists.at n=17A346177
• a(n) is the first prime p such that the next n primes are p+2*k^2 for k=1..n.at n=5A350868
• G.f. satisfies A(x) = Sum_{n>=1} 2^(n-1) * A(x^(2*n))/A(x^n), with A(0) = 0 and A'(0) = 1.at n=16A378262
• Prime numbersat n=6487