A355895 Even terms in A354790, divided by 2, in order of appearance.

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.

Links

Table of n, a(n) for n=1..24.

Crossrefs

Cf. A354790, A355896.

Sequence in context: A288902 A288832 A164808 * A153285 A083557 A119324

Adjacent sequences: A355892 A355893 A355894 * A355896 A355897 A355898

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 27 2022

Extensions

a(16)-a(24) from Rémy Sigrist, Aug 29 2022

Status

approved