18481

Properties

Appears in sequences

• Number of partitions into non-integral powers.at n=19A000135
• Palindromic primes: prime numbers whose decimal expansion is a palindrome.at n=42A002385
• Palindromic Super-2 Numbers.at n=33A032750
• a(n) = (10*n^3 - 9*n^2 + 2*n)/3 + 1.at n=18A034721
• Palindromic and prime Fibonacci-lucky numbers.at n=20A039679
• Palindromic primes containing no pair of consecutive equal digits.at n=36A050784
• Prime number spiral (clockwise, Southeast spoke).at n=23A054564
• Smallest number that is centered polygonal in exactly n ways.at n=14A063773
• Numbers n for which there are exactly nine k such that n = k + reverse(k).at n=35A072433
• Right diagonal of triangle in A072467.at n=21A072469
• a(1) = 2, a(2) = 3 and a(n) = the smallest prime which is a linear combination of a(n-1) and a(n-2) of the form r*a(n-1) + s*a(n-2) with r,s >=1.at n=11A072535
• Palindromic primes with nonprime middle digit.at n=20A076613
• Palindromic primes = 1 mod 4.at n=22A081220
• Palindromic primes with middle digit 4.at n=4A082440
• Palindromic primes whose digital root equals their middle digits.at n=3A082518
• Palindromic prime units W appearing twice in first-order fractal palindromic primes WmW.at n=21A082598
• Palindromic primes using only nonprime digits (0,1,4,6,8,9).at n=10A083185
• Primes in A003154.at n=29A083577
• Duplicate of A083185.at n=10A084987
• Palindromic hypotenuses in primitive Pythagorean triples.at n=30A087456