51539607551
domain: N
Appears in sequences
- Primes of form 3*2^n - 1.at n=9A007505
- Start with n, apply k->2k+1 until reach new record prime; sequence gives record primes.at n=11A051919
- Let t(x) be the highest power of 2 which divides x+1. Then a(1)=3; a(n) is the least prime p for which t(p) > t(a(n-1)).at n=18A084924
- a(n) = 3*4^n-1.at n=17A198693
- a(n) = 6*8^n-1.at n=11A198854
- Primes p that give record exponents of 2 in p^2 - 1 (A091282).at n=22A233930
- Decimal representation of the n-th iteration of the "Rule 185" elementary cellular automaton starting with a single ON (black) cell.at n=18A267614
- Numbers k such that A332547(k) = 3.at n=17A332549
- Primes of the form q*2^h - 1, where q is a Mersenne prime (A000668).at n=29A335874
- Primes of the form q*2^h - 1, where q is a Fermat prime.at n=31A336116
- a(n) is the least prime of the form 2^j*3^k - 1, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.at n=33A337437