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A260666
Number of patterns with perimeter n in the planar net 3.3.4.3.4, mirrors and holes are excluded.
1
0, 0, 1, 2, 1, 3, 6, 13
OFFSET
1,4
COMMENTS
Inspired by A057729 which is in planar net 3.3.3.3.3.3.
CROSSREFS
Cf. A057729.
Sequence in context: A049900 A024741 A024961 * A140644 A321651 A326308
KEYWORD
nonn,more
AUTHOR
Kival Ngaokrajang, Nov 14 2015
STATUS
approved