266239

Properties

Appears in sequences

• a(n) is the smallest x such that the quotient d(x+1)/d(x) equals n, where d = A000005.at n=25A080371
• Penta-Primes. Prime Numbers n as a Sum of 5 consecutive prime numbers (four twin primes and single prime number in between) are primes.at n=30A138397
• 8^n+4^n-1^n.at n=6A155619
• Semi-sums (average) of two (not necessarily distinct) Mersenne primes (A000668).at n=25A169628
• Semi-sums (average) of any two distinct Mersenne primes (A000668).at n=19A171253
• Primes which are the average of any two (not necessarily distinct) Mersenne primes (A000668).at n=19A171254
• Primes which are the average of two distinct Mersenne primes (A000668).at n=13A171255
• Primes of the form 4^k + 4^m - 1, where k and m are positive integers.at n=25A234310
• Primes of the form m = 4^i + 4^j - 1, where i > j >= 0.at n=20A239714
• Primes of the form m = 8^i + 8^j - 1, where i > j >= 0.at n=4A239718
• a(n) is the smallest prime p such that p + 1 has 2n divisors.at n=25A340799
• Primes that are partial sums of the semiprimes.at n=39A347366
• Numbers k such that A163511(k) is a seventh power.at n=34A366287
• Prime numbersat n=23332