405504

Appears in sequences

• Palindromes which are the sum of a twin prime pair.at n=9A037076
• Smallest natural number k such that periodic part of 1/k is n, or 0 if no such k exists.at n=19A037207
• Smallest natural number k such that periodic part of 1/k is the prime p(n), or 0 if no such k exists.at n=7A037218
• Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reverse, inequivalent to complement and reversed complement.at n=16A045667
• a(n) is the smallest palindrome > a(n-1) such that a(1)+a(2)+...+a(n) is a prime.at n=37A051934
• Expansion of (-1 + 1/(1-8*x)^8)/(64*x); related to A053107.at n=4A053111
• 15-almost primes (generalization of semiprimes).at n=26A069276
• a(1) = 1; a(n) = smallest palindrome which is a nontrivial product of n palindromes (repetitions allowed).at n=12A071277
• a(1) = 1; a(n) = smallest palindrome which is a nontrivial product of n palindromes (repetitions allowed).at n=13A071277
• a(1) = 1; a(n) = smallest palindrome which is a nontrivial product of n palindromes (repetitions allowed).at n=14A071277
• Smallest palindrome with exactly n prime factors (counted with multiplicity).at n=15A076886
• Smallest palindrome divisible by an n-th power.at n=10A082613
• Smallest palindrome divisible by an n-th power.at n=11A082613
• Smallest palindrome divisible by an n-th power.at n=12A082613
• Near duplicate of A071277.at n=12A088114
• Near duplicate of A071277.at n=13A088114
• Near duplicate of A071277.at n=14A088114
• Largest palindromic divisor of n!! (double factorial = A006882(n)).at n=21A114340
• Largest palindromic divisor of n!! (double factorial = A006882(n)).at n=23A114340
• Largest palindromic divisor of n!! (double factorial = A006882(n)).at n=25A114340