180181

Properties

Appears in sequences

• Primes formed by concatenating n with n+1.at n=22A030458
• Erroneous version of A134996.at n=16A038136
• Primes whose decimal expansion is a concatenation of two or more consecutive increasing numbers (no leading zeros allowed).at n=23A052087
• Primes having only {0, 1, 8} as digits.at n=33A061247
• Smallest number that is centered polygonal in exactly n ways.at n=23A063773
• Numbers k such that (18^k - 1)/17 is prime.at n=5A133857
• Primes formed by concatenating k with k+1, where k+1 is a prime.at n=13A134428
• Dihedral calculator primes: p, p upside down, p in a mirror, p upside-down-and-in-a-mirror are all primes.at n=17A134996
• a(n) is the least prime number p such that every sum of two or more divisors of p^n is composite.at n=16A160994
• Primes consisting of all of the cube digits (i.e., 0, 1 and 8) at least once.at n=20A180685
• Primes of the form 2*n^3 + 5*n^2 + 3*n + 1.at n=18A196153
• Palindromic primes in the sense of A007500 with digits '0', '1' and '8' only.at n=9A199328
• Dodecanacci numbers (12th-order Fibonacci sequence): a(n) = a(n-1) +...+ a(n-12) with a(0)=...=a(11)=1.at n=26A207539
• Emirps (A006567) whose difference with the reversal is a perfect square.at n=26A217386
• The greater of twin primes p2 such that 2*p1 + p2 is a prime number (A174913) and also the lesser of other twin primes in A174913.at n=10A242773
• Primes of the form A060735(k) +- 1, where A060735 lists multiples of primorials (A002110) less than the next larger primorial.at n=47A257658
• a(n) = the least integer that is centered polygonal in exactly n ways.at n=22A279830
• Numbers k such that psi(phi(k))/k > psi(phi(m))/m for all m < k, where phi is Euler's totient function (A000010) and psi is the Dedekind psi function (A001615).at n=26A293712
• Primes p such that the 3 X 3 matrix with components (row by row) prime(k+m), 0 <= m <= 8 has zero determinant, where p = prime(k).at n=22A337160
• Prime numbersat n=16355