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A011950
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Number of Barlow packings with group P3(bar)m1(SO) that repeat after 2n-1 layers.
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0
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1, 3, 3, 11, 21, 39, 85, 171, 333, 683, 1364, 2715, 5461, 10923, 21813, 43687, 87381, 174699, 349525, 699051, 1397970, 2796203, 5592402
(list; graph; refs; listen; history; internal format)
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