41893

Properties

Appears in sequences

• Ratio from A049102.at n=49A049106
• Primes associated with A066042.at n=13A066146
• Primes from merging of 5 successive digits in decimal expansion of the Golden Ratio, (1+sqrt(5))/2.at n=4A103809
• Number of n X 6 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=6A207303
• Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=5A207310
• Primes p such that 4*p is greater than the greatest prime factor of p^4 -1 and p^4 + 1.at n=10A218849
• Primes p such that k*p is greater than the greatest prime factor of p^k - 1 and p^k + 1 for k = 1 to k = 4.at n=1A218908
• a(n) = (n+1)*Sum_{k=0..(n-1)/2} (binomial(k+1,n-2*k-1)*binomial(2*k,k)/(k+1)^2).at n=17A270709
• Primes p such that p+4, 3*p+4 and 3*p+8 are also prime.at n=21A352170
• Primes p such that p^2 + 1 has more divisors than p^2 - 1.at n=30A358879
• Number of unsensed planar maps with n vertices and 2 faces.at n=10A380239
• Prime numbersat n=4379