32611

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 4x + 3.at n=16A023311
• Primes that remain prime through 4 iterations of the function f(x) = 9x + 8.at n=13A023326
• Primes that remain prime through 5 iterations of function f(x) = 4x + 3.at n=4A023339
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers), t = (primes).at n=36A024604
• Numerators of continued fraction convergents to sqrt(587).at n=7A042124
• Primes such that the sum of their digits and the sum of the reciprocals of their digits is also prime.at n=17A064779
• Initial prime of the first prime chain of length n under the iteration x -> 4x + 3.at n=8A084957
• Terms in A006512 containing the digit "6" at least once, such that changing every "6" to a "9" and vice versa yields a larger term in A006512.at n=8A123211
• Number of n X 5 0..2 arrays with row sums 5 and column sums n.at n=3A172639
• Number of n X 4 0..2 arrays with row sums 4 and column sums n.at n=4A172642
• Number of 5*n X 4*n 0..2 arrays with row sums 4 and column sums 5.at n=0A172700
• a(n) is the smallest prime of the form 4k + 3 such that the first n iterations of the map p -> 4p + 3 are prime with the next iteration being composite.at n=8A179767
• Smallest prime q such that q + prime(n) is a power of 2.at n=36A191474
• Smallest prime that can be expressed as the sum of n distinct positive squares with the largest square as small as possible.at n=43A224498
• Primes p such that p^4 - p +/- 1 are twin primes.at n=19A236952
• Primes whose sum of reciprocal of digits is a prime.at n=19A266815
• Array read by antidiagonals: T(n,k) is the number of {-1,0,1} n X k matrices with all rows and columns summing to zero.at n=49A334549
• Array read by antidiagonals: T(n,k) is the number of {-1,0,1} n X k matrices with all rows and columns summing to zero.at n=50A334549
• 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=3A346206
• 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=24A369877