18457

Properties

Appears in sequences

• Value of an urn with n balls of type -1 and n balls of type +1.at n=8A003127
• Primes that remain prime through 3 iterations of function f(x) = 8x + 5.at n=18A023293
• Numbers k such that 239*2^k+1 is prime.at n=24A032496
• Exponents in expansion of rank-2 Artin constant product(1-1/(p^3-p^2), p=prime) as a product zeta(n)^(-a(n)).at n=34A065417
• Primes which yield a prime whenever a 1 is inserted anywhere in them (including at the beginning or end).at n=25A069246
• Output of the linear congruential pseudo-random number generator rand() used in Microsoft's Visual C++.at n=25A096558
• Numerators of values T(m,m) of urn game described in A108885 and A108886.at n=8A108883
• Primes p1 such that p1^2+p2^3=pp are average of twin primes. p1 and p2 consecutive primes, p1 < p2.at n=19A138715
• Primes congruent to 13 mod 53.at n=40A142543
• Primes congruent to 49 mod 59.at n=33A142776
• Primes congruent to 35 mod 61.at n=36A142833
• Primes congruent to 32 mod 67.at n=35A154621
• Primes of the form 2^x+x+y+2^y, with x and y integers of any sign.at n=14A162574
• Number of nondecreasing arrangements of 6 numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*x(i)^2 zero.at n=19A188006
• Primes p such that the least k with p+k and p+2k both prime sets a new record.at n=16A190423
• Number of (n+5) X 10 0..1 matrices with each 6 X 6 subblock idempotent.at n=9A224574
• Primes p such that p^4-p^3+1 and p^4-p^3-1 are also primes.at n=5A238136
• Primes p for which there are exactly as many primes in the range [p^2, p*nextprime(p)] as there are in the range [p*nextprime(p), nextprime(p)^2], where nextprime(p) gives the next prime after prime p.at n=27A256472
• Primes of form n^2 + 1296.at n=15A256834
• a(n) = least m > 1 such that m + (prime(n)#)^n is prime.at n=33A263925