27691

Properties

Appears in sequences

• Number of decimal digits in the numerator of the 10^n-th Bernoulli number.at n=4A103233
• Primes such that applying "reverse and add" twice produces two more primes.at n=14A174402
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=12A207107
• Numbers k such that sum of digits of k = sum of digits of anti-divisors of k.at n=16A213239
• Primes of the form 2*n^2 + 58*n + 27.at n=22A217498
• Primes p such that p-2 and q are primes, where q is concatenation of binary representations of p and p-2: q = p * 2^L + p-2, where L is the length of binary representation of p-2: L=A070939(p-2).at n=40A232237
• Primes which become squares when the digits are rotated once to the right.at n=18A234925
• Primes p such that both 2p-1 and 2p^2-2p+1 are prime.at n=36A274609
• Primes p such that the sum of cubes of the 4 consecutive primes starting with p is twice a prime.at n=32A368637
• Number of cyclic edge cuts in the n-antiprism graph.at n=2A378310
• Prime numbersat n=3020