2097143

Properties

Appears in sequences

• Largest prime <= 2^n.at n=20A014234
• Largest prime <= 8^n.at n=6A104093
• Prime nearest to 2^n. In case of a tie, choose the smaller.at n=21A117387
• Triangle read by rows n>=0: the largest prime <= m^n+2 in columns m=3..n+3.at n=33A118132
• Largest prime factor of the odd Catalan number A038003(n).at n=18A120274
• Primes of the form k^7-k-1.at n=0A126435
• Least prime of the form x^n-x-1.at n=5A126439
• Largest prime <= 2^((n+1)/2).at n=40A133225
• a(n) = 4*2^n - 9.at n=18A172252
• a(n) = 2^n - 9.at n=21A185346
• Primes of the form 8n^3-9.at n=12A200959
• Largest safe prime less than 2^n.at n=18A243916
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 670", based on the 5-celled von Neumann neighborhood.at n=20A283607
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 974", based on the 5-celled von Neumann neighborhood.at n=20A284543
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 569", based on the 5-celled von Neumann neighborhood.at n=20A289408
• a(n) is the largest prime 2^(n-1) <= p < 2^n maximizing the Hamming weight of all primes in this interval.at n=19A333877
• Prime nearest to 2^n. In case of a tie, choose the larger.at n=21A356434
• Prime numbersat n=155611