A355896 -id:A355896

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Search: a355896 -id:a355896

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A355895

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

+10
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

(list; graph; refs; listen; history; text; internal format)

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.

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 27 2022

EXTENSIONS

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

STATUS

approved

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