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A307456
a(n) is the number of canonical polygons with 2n edges having exactly 2 lines of reflection symmetry.
8
2, 2, 1, 4, 11, 24, 47, 99, 211, 437, 909, 1925
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..13.
Lars Blomberg,
Examples of canonical polygons with exactly 2 lines of reflection symmetry
CROSSREFS
Cf.
A052436
,
A307387
,
A307391
,
A307426
,
A307454
,
A307455
,
A307456
,
A307519
.
Sequence in context:
A185041
A086873
A101560
*
A291260
A350825
A218529
Adjacent sequences:
A307453
A307454
A307455
*
A307457
A307458
A307459
KEYWORD
nonn
,
more
AUTHOR
Lars Blomberg
, Apr 09 2019
STATUS
approved
