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Search: id:A032070
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| A032070 |
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Number of reversible strings with n labeled beads of 3 colors, no palindromes of more than 1 bead. |
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1
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| 3, 6, 54, 864, 12960, 252720, 5307120, 130636800, 3527193600, 106697606400, 3521021011200, 127105948569600, 4957131994214400, 208390202679859200, 9377559120593664000, 450260112212951040000
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