1224736769domain: NAppears in sequencesMinimal 2^n safe-primes: a(n) = 2^n*A051886(n) + 1 (a prime number).at n=24A051900Duplicate of A051900.at n=24A084706Least prime of the form 1 + p*2^n, where p is an odd prime.at n=23A134854