32969

Properties

Appears in sequences

• Smaller of twin primes whose middle term is a multiple of A002110(4)=210.at n=26A060230
• Alternating sum of first three Stirling numbers of the first kind.at n=7A081103
• Primes of the form 15x^3+x+1.at n=4A114357
• a(n) = (n^6 - 126*n^5 + 6217*n^4 - 153066*n^3 + 1987786*n^2 - 13055316*n + 34747236)/36.at n=7A121888
• Number of distinct values taken by 9^9^...^9 (with n 9's and parentheses inserted in all possible ways).at n=13A145549
• Binary transpose primes. Integers of k^2 bits which, when written row by row as a square matrix and then read column by column, are primes once transformed.at n=34A155967
• List of primes p1 such that (p1,p2) are twin primes where both 2*p1+p2 and p1+2*p2 are primes.at n=15A174920
• The lesser of twin primes p1 such that 2*p1 + p2 is a prime number (A174913) and also the lesser of other twin primes in A174913.at n=2A242772
• Primes equal to the sum of both two and three successive semiprimes.at n=27A255897
• Numbers k such that 7*R_k - 30 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=17A256829
• Primes of the form abs(1/(36)(n^6 - 126n^5 + 6217n^4 - 153066n^3 + 1987786n^2 - 13055316n + 34747236)) in order of increasing nonnegative n.at n=7A272555
• Prime-indexed primes q such that prime(q) + q + 1 is a prime-indexed prime.at n=19A318292
• Primes p such that p+2, p*(p+1)/2-2 and p*(p+1)/2+2 are also primes.at n=15A349336
• a(n) is the first start of a sequence of exactly n lower twin primes under the iteration p -> 3*p+2.at n=2A352162
• Expansion of g.f. (1 - x)*(1 - 2*x)(1 - 4*x)/(1 - 8*x + 20*x^2 - 18*x^3 + 3*x^4).at n=9A374165
• Prime numbersat n=3533