34687

Properties

Appears in sequences

• Numbers n such that the number formed by the digits of 2n sorted in ascending order is equal to the sum of the divisors of n after the digits of each divisor have been sorted in ascending order.at n=8A083387
• a(n) = sqrt(A084004(n)).at n=12A084005
• Numbers A such that the square of concatenation AA is of form NNMM.at n=12A107677
• Denominators of triangle T(n,k), n>=0, 0<=k<=n, read by rows: T(n,k) is the coefficient of x^(2k+1) in polynomial u_n(x), used to approximate x->sin(Pi*x)/Pi.at n=22A144847
• Primes p such that 2*prime(p) + 1 = prime(q) for some prime q.at n=33A261361
• Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 6 or 8 king-move adjacent elements, with upper left element zero.at n=7A305481
• Larger of super amicable pair m < n defined by sigma(sigma(m)) = sigma(sigma(n)) = m + n.at n=2A324256
• Primes p such that (p^512 + 1)/2 is prime.at n=6A341264
• a(n) is the least prime > a(n-2) such that a(n-1)+a(n) is a square.at n=34A359582
• List of graphs that are squares, encoded as in A382754.at n=36A382761
• Primes p such that there exists prime q < p such that sigma(p+1) = sigma(q+1) = p + q.at n=1A385586
• Prime numbersat n=3705