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A247001
A246335
(2^n-1).
1
1, 5, 21, 85, 317, 1157
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OFFSET
0,2
COMMENTS
Mysteriously different from
A002450
.
LINKS
Table of n, a(n) for n=0..5.
CROSSREFS
Cf.
A246333
,
A246334
,
A246335
,
A002450
.
Sequence in context:
A289797
A246986
A272547
*
A271157
A255451
A028948
Adjacent sequences:
A246998
A246999
A247000
*
A247002
A247003
A247004
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Sep 21 2014
STATUS
approved
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Last modified May 4 03:55 EDT 2024. Contains 372225 sequences. (Running on oeis4.)