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A347694
Largest k <= 2*n such that k is a prime or twice a prime.
1
2, 4, 6, 7, 10, 11, 14, 14, 17, 19, 22, 23, 26, 26, 29, 31, 34, 34, 38, 38, 41, 43, 46, 47, 47, 47, 53, 53, 58, 59, 62, 62, 62, 67, 67, 71, 74, 74, 74, 79, 82, 83, 86, 86, 89, 89, 94, 94, 97, 97, 101, 103, 106, 107, 109, 109, 113, 113, 118, 118, 122, 122, 122, 127, 127, 131, 134, 134, 137, 139
OFFSET
1,1
COMMENTS
Suggested by the formula for A016726.
CROSSREFS
Sequence in context: A002158 A319829 A272631 * A274431 A236477 A189214
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 05 2021
STATUS
approved