18517

Properties

Appears in sequences

• Incorrect duplicate of A297408.at n=15A007355
• Numbers k such that the continued fraction for sqrt(k) has period 59.at n=27A020398
• Primes at which the difference pattern X42Y (X and Y >= 6) occurs in A001223.at n=35A052164
• Smallest prime a(n) such that concatenation of first n+1 primes starting from a(n), separated by n zeros, is prime.at n=29A102109
• Expansion of 1/(1-(x+x^2)c(2x)), c(x) the g.f. of A000108.at n=7A110508
• Primes p such that q = 4p^2 + 1 and r = 4q^2 + 1 are also prime.at n=26A122424
• Primes of the form 256 k + 85.at n=17A127593
• List of different primes in Pascal-like triangles with index of asymmetry y = 2 and index of obliquity z = 0 or z = 1.at n=9A141067
• Primes congruent to 50 mod 59.at n=34A142777
• Primes congruent to 34 mod 61.at n=32A142832
• Number of (n+2) X 4 0..3 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=5A186874
• Number of (n+2)X8 0..3 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=1A186878
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=22A186881
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=26A186881
• Primes of the form n^2+number of divisors of n^2.at n=21A188665
• Primes p such that both prevprime(p^2) - 2 and nextprime(p^2) + 2 are also primes.at n=10A226986
• Non-palindromic balanced primes in base 16.at n=17A256090
• Numbers n such that both n*log(2) and n*log(3) are within 1/sqrt(n) of integers.at n=35A259483
• a(n)=least number that is cyclops for exactly n distinct bases b > 1.at n=9A285987
• Number of nX7 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=7A298962