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A001371
Number of n-bead necklaces with beads of 2 colors and primitive period n, when turning over is allowed.
(Formerly M0115 N0045)
+0
8
1, 2, 1, 2, 3, 6, 8, 16, 24, 42, 69, 124, 208, 378, 668, 1214, 2220, 4110, 7630, 14308, 26931, 50944, 96782, 184408, 352450, 675180, 1296477, 2493680, 4805388, 9272778, 17919558, 34669600, 67156800, 130215996, 252741255
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.
AT&T Labs Research
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