27271

Properties

Appears in sequences

• Decimal part of cube root of a(n) starts with 1: first term of runs.at n=28A034127
• Primes whose consecutive digits differ by 5 or 6.at n=17A048417
• 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=29A078855
• Primes of the form p = prime(k) = (prime(k+3)+prime(k-1))/2.at n=26A126238
• Primes p of the form : p+p^2+p^3-+4=prime.at n=9A154822
• Primes such that applying "reverse and add" twice produces two more primes.at n=12A174402
• Primes formed by concatenating k, k, and 1 for k >= 1.at n=8A210511
• Primes p such that b=2*p+1 is semiprime, c=2*b+1 is 3-almost prime and d=2*c+1 is 4-almost prime.at n=24A235646
• Prime numbers resulting from the concatenation of at least two copies of a cubic number followed by a trailing "1.".at n=1A265181
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 51", based on the 5-celled von Neumann neighborhood.at n=34A270020
• Primes p such that both 2p-1 and 2p^2-2p+1 are prime.at n=34A274609
• Primes for which the sum of all preceding odd-indexed prime gaps is exactly one greater than the sum of all preceding even-indexed prime gaps.at n=21A282178
• Primes equal to a pentagonal number plus 1.at n=26A285789
• Union of 2, A282178, and A330339.at n=29A330554
• Primes p such that if q is the next prime, p+A004086(q) and q+A004086(p) are prime.at n=34A351728
• Prime numbersat n=2985