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A124387 Largest prime < 2*a[n-1] written in binary, a[1]=2. 0
10, 11, 101, 111, 1101, 10111, 101011, 1010011, 10100011, 100111101, 1001110111, 10011101011, 100111000111, 1001110001011, 10011011110101, 100110111100001, 1001101110111101, 10011011101010011, 100110111010011101, 1001101110100011111, 10011011101000111011 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
NestList[FromDigits[IntegerDigits[NextPrime[FromDigits[IntegerDigits[ 2#], 2], -1], 2]]&, 10, 20] (* Harvey P. Dale, Sep 26 2015 *)
CROSSREFS
Sequence in context: A206073 A004676 A303593 * A171796 A362917 A305379
KEYWORD
nonn
AUTHOR
Artur Jasinski, Dec 16 2006
EXTENSIONS
Corrected and extended by Harvey P. Dale, Sep 26 2015
STATUS
approved

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Last modified June 19 15:07 EDT 2024. Contains 373503 sequences. (Running on oeis4.)