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A011961
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Number of ferrites M_4Y_n that repeat after 6n+20 layers.
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0
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0, 1, 2, 2, 3, 6, 6, 9, 13, 15, 18, 25, 27, 34, 42, 47, 54, 67, 72, 84
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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REFERENCES
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T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).
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LINKS
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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