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A068806
Ulam numbers that are powers of 2.
0
1, 2, 4, 8, 16, 8192, 16777216, 67108864
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OFFSET
1,2
COMMENTS
There are no other terms < 2^24. 
Jud McCranie
, Feb 12 2003
From
Amiram Eldar
, Aug 22 2020: (Start)
a(9) > 2^31.
The corresponding exponents of 2 are 0, 1, 2, 3, 4, 13, 24, 26, ...
The corresponding indices of Ulam numbers are 1, 2, 4, 6, 9, 694, 1241891, 4964116, ... (End)
LINKS
Table of n, a(n) for n=1..8.
Index to divisibility sequences
CROSSREFS
Intersection of
A000079
and
A002858
.
Sequence in context:
A281291
A346644
A164312
*
A090804
A342773
A080281
Adjacent sequences:
A068803
A068804
A068805
*
A068807
A068808
A068809
KEYWORD
nonn
,
more
AUTHOR
Naohiro Nomoto
, Mar 29 2002
EXTENSIONS
a(7)a(8) from
Amiram Eldar
, Aug 22 2020
STATUS
approved
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Last modified June 16 11:09 EDT 2024. Contains 373429 sequences. (Running on oeis4.)