38609

Properties

Appears in sequences

• Primes p such that 13 is the largest of all prime factors of the numbers between p and the next prime (cf. A052248).at n=23A080188
• Number of ways of arranging n straight lines in general position in the (affine) plane.at n=8A090338
• Primes of the form prime(n)^2 - prime(n+1) - 1.at n=20A097938
• Primes of the form n^2+5*n+c (n>=0), where c=3 for even n and c=-3 for odd n.at n=35A117012
• Coefficients of a Ramanujan q-series.at n=34A143184
• Primes p such that 3*p+4, 5*p+6 and 7*p+8 are also prime.at n=34A173879
• Number of partitions p of n such that (number of even numbers in p) = (number of odd numbers in p).at n=49A241638
• Primes of the form k+(k+3)^2 where k is a nonnegative integer.at n=37A248697
• Primes p with p-1, p+1, prime(p)-1 and prime(p)+1 all practical.at n=9A257924
• Primes p such that prime(p)^2 - 2 = prime(q) for some prime q.at n=38A261354
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 411", based on the 5-celled von Neumann neighborhood.at n=37A271891
• Numbers that are the smallest of four consecutive primes, no three of which sum to a nonprime.at n=14A298763
• Sum of numerator and denominator in a rational approximation j/k of q = log(2)/log(3), such that abs(j/k - q) is a new minimum.at n=25A355513
• Sum of numerator and denominator in a rational approximation j/k of q = log(2)/log(3), such that q - j/k is a new minimum, i.e., q is approximated from below.at n=33A355514
• Primes dividing terms of A231830.at n=38A362252
• Prime numbersat n=4067