472391

Properties

Appears in sequences

• Class 1+ primes: primes of the form 2^i*3^j - 1 with i, j >= 0.at n=38A005105
• Smaller term of a pair of twin primes such that prime factors of their average are only 2 and 3.at n=10A059960
• Smaller member of a twin prime pair with a square sum.at n=23A069496
• Duplicate of A059960.at n=10A075582
• Lesser member p of a twin prime pair such that p+1 is 3-smooth.at n=11A078883
• Smallest prime p such that 3^n divides p^2 - 1.at n=9A125609
• Smallest odd prime base q such that p^10 divides q^(p-1) - 1, where p = prime(n).at n=1A133860
• Numbers of the form i*9^j-1 (i=1..8, j >= 0).at n=47A140576
• Primes of the form 2^i*3^j - 1 with i + j = 13.at n=5A172315
• a(n) = 8*3^n - 1.at n=10A198644
• a(n) = 8*9^n-1.at n=5A198966
• Primes of the form 3n^3-1.at n=11A200846
• Primes of the form 2^i * 3^j - 1 for positive i, j.at n=31A268640
• Smaller member of a twin prime pair with a perfect power sum.at n=26A270231
• Primes p such that all the composite numbers between p and its next prime have no more than 2 distinct prime factors.at n=29A303436
• Numbers k such that k*(k+1)*(k+2) has exactly 4 distinct prime factors.at n=58A325204
• Least number k such that half of the numbers from 0 to k inclusive contain the digit n.at n=4A344474
• Numbers that can be written as 2*a^2 - 1 and 3*b^3 - 1.at n=3A345702
• Numbers k such that k and k+1 are both in A359747.at n=22A359748
• Numbers k for which omega(k)*omega(k + 1)*omega(k + 2) = 2 where omega = A001221.at n=27A391044