18427

Properties

Appears in sequences

• Coordination sequence for MgZn2, Mg position.at n=34A009939
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 74 ones.at n=20A031842
• Numbers k such that 37^k - 36^k is prime.at n=5A062603
• Primes p such that p+5==0 (mod phi(p+5)).at n=32A067542
• Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern = [6, 6, 4]; short d-string notation of pattern = [664].at n=14A078858
• Expansion of (1+2*x^3)/(1-x+x^3-2*x^4).at n=37A103750
• Primes congruent to 36 mod 53.at n=36A142566
• Primes congruent to 19 mod 59.at n=39A142746
• Primes congruent to 5 mod 61.at n=34A142803
• Reverse binary expansion of the Fibonacci numbers.at n=22A143250
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11100-00100-00111 pattern in any orientation.at n=16A147253
• Odd primes of the form (1+n)*(2+2*n)+n*(3+2*n) = 4*n^2+7*n+2.at n=20A171749
• Primes p such that 10p+1 divides 2^p-1.at n=40A188133
• Smallest prime factor of 3^n+1 having the form 2*k*n+1.at n=35A189241
• Primes of the form 2n^2 - 5.at n=17A201713
• Primes of the form 8n^2 - 5.at n=9A201857
• Primes that are the sum of 25 consecutive primes.at n=26A215991
• Primes that are reached by an ever increasing aliquot sequence.at n=14A234842
• Smallest odd prime factor of 3^n + 1, for n > 1.at n=35A235365
• Primes with property that when their binary representation is reversed we obtain a Fibonacci number.at n=8A242334