178817

Properties

Appears in sequences

• Primes p such that p+2, p^2 - 2p + 2, and p^2 - 2p + 4 are all prime.at n=33A101315
• Primes of the form XYYX, where Y is a single digit.at n=3A214290
• Primes, p, that generate the prime quadruplets, p^2-2p+2k (for k = -2, -1, 1, 2).at n=2A247845
• Numbers, p, that generate the prime quadruplets p^2-2p+2k (for k = -2, -1, 1, 2).at n=17A247882
• Number of (1+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.at n=12A252434
• a(n) = floor(a(n-1)^(3/2)), a(1) = 3.at n=6A254402
• Least prime p such that prime(p*n)-1 is a square, or 0 if no such p exists.at n=49A259764
• Primes such that the decimal digits in the first half of the number are a nontrivial permutation of the digits in the second half.at n=32A297994
• Prime numbersat n=16230