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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
OFFSET
1,1
KEYWORD
nonn,more
AUTHOR
Lars Blomberg, Apr 08 2019
STATUS
approved