42461

Properties

Appears in sequences

• 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 82.at n=0A031670
• Numerator of the rational sequence c(n) defined by c(n+1) - 2*c(n) = Bernoulli number B_n (A027641/A027642).at n=9A172032
• Numerator of the rational sequence c(n) defined by c(n+1) - 2*c(n) = Bernoulli number B_n (A027641/A027642).at n=10A172032
• Prime numbers p such that x^2 + x + p produces primes for x = 0..3 but not x = 4.at n=28A210362
• Primes that are exactly between the nearest square and the nearest triangular number.at n=21A233443
• Numbers k such that C(k+2,2) divides 2^(k+1) - 1.at n=24A246636
• Primes p such that (p^2+2)/3 and (p^4+2)/3 are prime.at n=37A256811
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000101.at n=11A259765
• Sequence shifts left five places under Weigh transform with a(n) = signum(n) for n<5.at n=36A316077
• Primes p such that Euler(p, 1) is an integer multiple of Bernoulli(p + 1, 1).at n=21A341759
• Primes of the form k^2 + 25.at n=44A346145
• Primes dividing terms of A231830.at n=40A362252
• Numbers k such that (35^k - 4^k)/31 is prime.at n=11A389768
• Prime numbersat n=4441