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URL: https://oeis.org/A166163

⇱ A166163 - OEIS

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A166163
a(n) = the largest possible prime made by inserting either a 0 or a 1 anywhere in the binary representation of the n-th prime, then converting to decimal.
0
5, 7, 13, 13, 23, 29, 41, 43, 47, 61, 61, 101, 89, 107, 79, 109, 107, 109, 163, 199, 149, 157, 211, 181, 197, 229, 199, 211, 173, 241, 251, 263, 281, 331, 293, 311, 349, 419, 359, 349, 359, 373, 383, 449, 421, 397, 467, 479, 467, 461, 467, 479, 433, 503, 769
OFFSET
1,1
COMMENTS
The inserted digit may be placed, as well as between any digits, right of the rightmost digit or immediately left of the leftmost 1. No 1 can be placed between any leading 0's. A 0 may be placed immediately left of the leftmost 1 if no other primes can be created otherwise.
CROSSREFS
Sequence in context: A002659 A357938 A164122 * A249801 A386873 A274558
KEYWORD
base,nonn
AUTHOR
Leroy Quet, Oct 08 2009
EXTENSIONS
Extended by Ray Chandler, Oct 18 2009
STATUS
approved