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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
OFFSET
2,1
KEYWORD
nonn,more
AUTHOR
Lars Blomberg, Apr 09 2019
STATUS
approved