1333331

Properties

Appears in sequences

• Palindromic reflectable primes.at n=24A007616
• Palindromic Sophie Germain primes.at n=21A051835
• Palindromic primes using only two distinct digits and only the exterior digit is different.at n=24A056728
• Primes in which a string of 3's is sandwiched between two 1's.at n=3A068645
• Primes which are a sandwich of numbers using at most one digit between two 1's.at n=10A068685
• Palindromic primes with middle digit 3.at n=29A082439
• Smallest palindromic prime containing exactly n 3's.at n=4A083974
• Smallest palindromic prime p, larger than previous term, such that concatenation of n and p is a prime.at n=26A103836
• Numbers k such that the k-th triangular number contains only digits {4,6,8}.at n=10A119213
• Numbers k such that k and k^2 use only the digits 1, 3, 5, 6 and 7.at n=26A137033
• a(n) = n 3's sandwiched between two 1's.at n=5A185127
• Primes of the form XYYYYYX, where Y is a single digit.at n=0A214291
• Palindromic prime numbers == 8 (mod 9).at n=31A229881
• Numbers whose divisors and arithmetic mean of divisors are palindromic.at n=11A326929
• a(n) is the smallest 2*n + 1 digit prime consisting of a string of 2*n - 1 identical digits d sandwiched between two same digits different from d, or -1 if no such prime exists.at n=2A385144
• Prime numbersat n=102383