18583

Properties

Appears in sequences

• Discriminants of quintic fields with 2 complex conjugates (negated).at n=31A023684
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 78 ones.at n=19A031846
• Least prime in A023200 (lesser of 4-twins) such that the distance to the next 4-twin is 6*n.at n=34A052351
• Sum of composite numbers between prime p and nextprime(p) is palindromic.at n=20A054266
• Sum of composite numbers between prime p and nextprime(p) is palindromic with restriction 'p + 1 <> sum'.at n=14A054267
• Primes congruent to 57 mod 59.at n=35A142784
• Primes congruent to 39 mod 61.at n=32A142837
• Primes the squares of which are Fibbinary numbers (A003714).at n=32A144759
• Middle of 3 consecutive prime numbers, p1, p2, p3, such that p1*p2*p3*d1*d2 = average of twin prime pairs; d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=17A153410
• Primes p such that 6p-7, 6p-5, 6p-1 are all prime.at n=41A157042
• Primes p such that 2*p^4+-9 are also prime.at n=15A174365
• Number of n X 2 0..5 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=29A201136
• Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than 5.at n=5A204210
• T(n,k) = Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than k.at n=50A204213
• Number of length 7 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than n.at n=4A204215
• Number of tilings of a 3 X n rectangle using integer-sided rectangular tiles of equal area.at n=27A220769
• Number of nondecreasing -n..n vectors of length 5 whose dot product with some nondecreasing -n..n vector equals 5.at n=7A226413
• Primes of a056240-type 3.at n=8A300359
• First of three consecutive primes p,q,r such that r^2-p^2+p, r^2-p^2+q and r^2-p^2+r are consecutive primes.at n=27A347531
• First of three consecutive primes p,q,r such that r*(p+q) + p*q and r*(p+q) - p*q are prime.at n=34A358382