18143

Properties

Appears in sequences

• Numbers k such that k^4 = x^3 + y^2 has an integer solution.at n=38A096741
• Numbers n such that (273*2^n-1)^2-2 is prime.at n=45A100913
• Number of 6-almost primes 6ap such that 2^n < 6ap <= 2^(n+1).at n=18A120037
• Smallest prime p = n*m + 1 that divides m^m - 1 for some m > 1.at n=46A125556
• Right truncatable primes in base 6 (written in decimal form).at n=32A129672
• Primes congruent to 30 mod 59.at n=35A142757
• Primes congruent to 26 mod 61.at n=30A142824
• Primes of the form 14 n^2-1.at n=10A143832
• a(n) = 14*n^2 - 1.at n=35A158485
• a(n) = 56*n^2 - 1.at n=17A158658
• Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 7 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.at n=24A166057
• Primes of the form 6n^2 - 7.at n=20A201792
• Number of nX2 0,1 arrays with the row and column sums nondecreasing.at n=12A202554
• Number of length n 0..4 arrays with each partial sum starting from the beginning no more than one standard deviation from its mean.at n=6A244784
• T(n,k)=Number of length n 0..k arrays with each partial sum starting from the beginning no more than one standard deviation from its mean.at n=51A244788
• Number of length 7 0..n arrays with each partial sum starting from the beginning no more than one standard deviation from its mean.at n=3A244795
• Non-palindromic balanced primes.at n=35A256076
• Inverse binomial transform of the "original" Bernoulli numbers [A164555(n)/A027642(n)] with 1 and 1/2 swapped. Numerators.at n=18A307974
• Primes p such that the sum of digits of p and digits of the next prime q is equal to the sum of digits of p*q.at n=45A346493
• a(n) is the smallest k such that k!'s prime(n)-smooth part is less than its prime(n+1)-rough part.at n=31A360316