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A355895
Even terms in A354790, divided by 2, in order of appearance.
2
1, 3, 11, 7, 17, 41, 37, 83, 79, 109, 241, 239, 499, 491, 1117, 1109, 2539, 2531, 5623, 5591, 11471, 11467, 23369, 23357
OFFSET
1,2
COMMENTS
The even terms in A354790 appear at indices 2, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535, ... and conjecturally at indices 2^k-1 for all k >= 3.
CROSSREFS
Sequence in context: A288902 A288832 A164808 * A153285 A083557 A119324
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Aug 27 2022
EXTENSIONS
a(16)-a(24) from Rémy Sigrist, Aug 29 2022
STATUS
approved