28817

Properties

Appears in sequences

• A sequence of sorted odd primes 3 = p_1 < p_2 < ... < p_m such that p_i-2 divides the product p_1*p_2*...*p_(i-1) of the earlier primes and each prime factor of p_i-1 is a prime factor of twice the product.at n=17A001259
• Quartan primes: primes of the form x^4 + y^4, x > 0, y > 0.at n=20A002645
• Numbers k such that the continued fraction for sqrt(k) has period 85.at n=22A020424
• Sum of terms in n-th rows of triangle in A077159.at n=38A077162
• Row sums of A081964.at n=38A081966
• Primes of the form 3n^2 + 5.at n=26A201478
• Primes of the form 4^x + y^4 with x, y > 0.at n=15A250717
• Primes of form n^2 + 256.at n=30A256776
• Primes of form n^2 + 28561.at n=2A256841
• Numbers m such that (4^m + 23) / 3 is prime.at n=23A261579
• Number of partitions of n such that the (sum of distinct even parts) < n/2.at n=39A284616
• Semi-octavan primes: primes of the form x^4 + y^8.at n=11A291206
• Numbers k such that 12*10^k - 7 is prime.at n=22A295032
• Primes of the form k + A037276(k) in more than one way.at n=9A340636
• Prime numbersat n=3139