41221

Properties

Appears in sequences

• Concatenation of prime p and nextprime(p) is prime -> cycles of 2 steps possible.at n=12A036339
• Third term of strong prime sextets: p(m-1)-p(m-2) > p(m)-p(m-1) > p(m+1)-p(m) > p(m+2)-p(m+1) > p(m+3)-p(m+2).at n=13A054815
• Numbers k such that (17^k + 1)/18 is a prime.at n=7A057183
• Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d=2,4 or 6) and forming d-pattern=[6, 4,2]; short d-string notation of pattern = [642].at n=34A078855
• Number of distinct lines through the origin in 3-dimensional cube of side length n.at n=36A090025
• Prime numbers p such that p +- ((p-1)/6) are primes.at n=41A137724
• Primes of the form k^2 + 12.at n=30A138368
• Coefficients of the sixth-order mock theta function psi_{-}(q).at n=33A153252
• Primes having only {1, 2, 4} as digits.at n=30A260267
• First of three consecutive primes p,q,r such that r^2-p^2+p, r^2-p^2+q and r^2-p^2+r are consecutive primes.at n=41A347531
• Prime numbers p such that the product of their prime digits is equal to the product of their nonprime digits, where p has at least one prime digit.at n=29A369877
• Number of chord-connected permutations on [n].at n=8A390400
• Prime numbersat n=4315