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A018781 Duplicate of A003523. 0
1, 3, 11, 31, 33, 93, 341, 1023 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..8.
CROSSREFS
Sequence in context: A009131 A003554 A003523 * A119215 A266970 A057172
Adjacent sequences: A018778 A018779 A018780 * A018782 A018783 A018784
KEYWORD
dead
STATUS
approved

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Last modified November 29 07:44 EST 2023. Contains 367429 sequences. (Running on oeis4.)