19927

Properties

Appears in sequences

• Cuban primes: primes which are the difference of two consecutive cubes.at n=35A002407
• Largest prime factor of 3^n + 1.at n=27A074476
• a(n) = sum of terms in n-th row of A078448.at n=21A078449
• Value of C in y = x^2 + 9x + C such that y is prime for all x = 0 to 5.at n=14A097437
• Number of partitions of 3-smooth numbers into parts not greater than 3.at n=32A117220
• Hex (or centered hexagonal) numbers that are prime powers of the form (6n+1)^k.at n=36A133323
• Primes congruent to 44 mod 59.at n=37A142771
• Primes congruent to 41 mod 61.at n=37A142839
• a(n) = 12*n^2 + 18*n + 7.at n=40A154105
• a(n) = ((3^(n-1) + 1)^3 - 1)/3^n.at n=4A198410
• Primes of the form 3^(2n-3)+3^(n-1)+1.at n=4A199192
• Greatest prime factor of n^9+1.at n=26A240552
• Number of length n+5 0..6 arrays with every six consecutive terms having five times some element equal to the sum of the remaining five.at n=3A249495
• T(n,k)=Number of length n+5 0..k arrays with every six consecutive terms having five times some element equal to the sum of the remaining five.at n=39A249497
• Number of length 4+5 0..n arrays with every six consecutive terms having five times some element equal to the sum of the remaining five.at n=5A249501
• Least m > 0 such that m*n^3 + 1 is a cube.at n=9A266236
• Largest prime factor of 9^n - 1.at n=26A274909
• Partial sums of A066570.at n=10A281025
• Primes of the form (1 + x)^y + (-x)^y where y is a divisor of x.at n=31A285887
• Primes that are the sum of two cubes.at n=36A334520