24943

Properties

Appears in sequences

• Erroneous version of A001393.at n=6A046743
• Number of initial odd numbers in class n of the iterated phi function.at n=36A092878
• Smallest positive real Gaussian prime having a gap size of exactly A128106(n).at n=12A128109
• K-bit primes p such that p-2^i and p+2^i are composite for 0<=i<=K-1.at n=16A153352
• Primes of the form floor( (k*(sqrt(3)*k-1))/sqrt(2) ).at n=20A180449
• Prime numbers P such that 8*P^2-1 and 8*(8*P^2-1)^2-1 are also prime numbers.at n=41A245674
• Odd numbers m that are neither of the form p + 2^k nor of the form p - 2^k with 2^k < m, k >= 1, and p prime.at n=34A255967
• Odd numbers m such that for all 2^k < m the numbers m + 2^k, m - 2^k, m*2^k + 1, and m*2^k - 1 are composite, with k >= 1.at n=3A256163
• Primes p such that for all 2^k < p the numbers p + 2^k, p - 2^k, p*2^k + 1, and p*2^k - 1 are composite.at n=1A256237
• Primes p such that 2*p+1 is divisible by the sum of digits of p+1.at n=37A267542
• Primes p whose last digit is the same as that of both its predecessor prime and its successor prime.at n=22A298075
• Prime numbersat n=2756