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A030222
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Number of n-polyplets (polyominoes connected at edges or corners); may contain holes.
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7
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1, 2, 5, 22, 94, 524, 3031, 18770, 118133, 758381, 4915652, 32149296, 211637205, 1401194463, 9321454604, 62272330564, 417546684096
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