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A174086
Number of permutations of length n with no consecutive triples i,...i+r,...i+2r (mod n) for all r, and for all equal spacings d.
3
16, 40, 204, 840, 6272, 35856
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OFFSET
4,1
COMMENTS
Here we count both the sequence 1,2,3 (r=1) as a progression in 1,2,3,0,4,5, (note d=1) and in 1,0,2,4,3,5 (here, d=2).
LINKS
Table of n, a(n) for n=4..9.
EXAMPLE
For n=4 note a(4) is the same as the value in
A165963
since there are no other distances that can be used (i.e. only d=1).
CROSSREFS
Cf.
A165963
,
A174084
,
A174085
,
A174087
.
Sequence in context:
A205186
A197903
A300901
*
A174081
A230802
A100958
Adjacent sequences:
A174083
A174084
A174085
*
A174087
A174088
A174089
KEYWORD
nonn
AUTHOR
Isaac Lambert
, Apr 20 2010
STATUS
approved
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Last modified August 6 23:53 EDT 2024. Contains 375002 sequences. (Running on oeis4.)