27367

Properties

Appears in sequences

• Number of distinct values taken by 3^3^...^3 (with n 3's and parentheses inserted in all possible ways).at n=13A003018
• Revert transform of 2*x*(1 - x + x^4 - x^5 + x^6)-x/(1+x).at n=9A049188
• Primes p equal to the sum of two successive sexy primes - 1 such that p - 6 is also prime.at n=33A104047
• Difference between the n-th partial sum of the squares (A000330) and the n-th partial sum of the primes (A007504).at n=44A108753
• Primes p such that q-p = 30, where q is the next prime after p.at n=33A124596
• Primes that are the average of the members of emirp pairs.at n=27A178581
• Nonpalindromic primes that are the average of the members of emirp pairs.at n=19A178585
• Index of first occurrence of 2n in A031883, or 0 if 2n never occurs in A031883 = first differences of lucky numbers A000959.at n=44A181558
• a(n) = A(n)*7^(-floor(n+1)/3), where A(n) = 7*A(n-1) - 14*A(n-2) + 7*A(n-3) with A(0)=0, A(1)=1, A(2)=7.at n=15A217444
• First primes of arithmetic progressions of 5 primes each with the common difference 30.at n=42A227281
• Expansion of (1+x)/ ((1+x)^3-7*x).at n=9A290186
• Primes p such that p=prime(k), prime(k+1), and prime(k+2) end in the same digit.at n=26A328452
• Primes p, with k digits, such that the Sum_{i=1..k} (p without its i-th digit)/(its i-th digit) is a prime.at n=2A346206
• Primes p such that if q is the next prime, p+A004086(q) and q+A004086(p) are prime.at n=36A351728
• Prime numbersat n=2993