

A127686


Number of nonisomorphic maximal independent sets of the ncycle graph having no symmetry axis.


0



0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 2, 2, 5, 4, 8, 9, 15, 16, 27, 30, 46, 55, 80, 96, 139, 168, 237, 293, 403, 503, 687, 864, 1164, 1477, 1974, 2516, 3348, 4282, 5668, 7284, 9604, 12374, 16279, 21022, 27597, 35718, 46819, 60693, 79480, 103174
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OFFSET

1,19


COMMENTS

Number of nonisomorphic (i.e. defined up to a rotation and a reflection) maximal independent sets of the ncycle graph having no symmetry axis. Also: Number of cyclic and nonpalindromic compositions of n in which each term is either 2 or 3, where a clockwise writing is not distinguished from its counterclockwise counterpart.


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CROSSREFS



KEYWORD

easy,nonn


AUTHOR

JeanLuc Marichal (jeanluc.marichal(AT)uni.lu), Jan 24 2007


STATUS

approved



