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A307426
a(n) is the number of canonical polygons with 4n edges having 4-fold rotational symmetry.
8
2, 2, 7, 22, 79, 289, 1145, 4655, 19314, 81242, 345785, 1484065, 6414999, 27895652
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..14.
Lars Blomberg,
Examples of canonical polygons with 4-fold rotational symmetry
CROSSREFS
Cf.
A052436
,
A307387
,
A307391
,
A307426
,
A307454
,
A307455
,
A307456
,
A307519
.
Sequence in context:
A184714
A156464
A156520
*
A343577
A342644
A069101
Adjacent sequences:
A307423
A307424
A307425
*
A307427
A307428
A307429
KEYWORD
nonn
,
more
AUTHOR
Lars Blomberg
, Apr 08 2019
STATUS
approved
