64877

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 2x + 3.at n=20A023303
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 26.at n=12A031614
• Primes p such that x^49 = 2 has no solution mod p, but x^7 = 2 has a solution mod p.at n=21A059667
• a(n) is the smallest lesser of twin prime p, such that prime(2 + p) - prime(p) = 2n (cf. A096474).at n=32A096475
• Lesser of twin balanced primes (A090403).at n=28A096694
• Numbers k such that k!4 + 2^7 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).at n=24A291348
• Number of non-congruent simple polygons with 2n sides on the unbounded chessboard such that each side is an edge of the corresponding knight graph.at n=4A368499
• Prime numbersat n=6483