| DATA
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0, 1, 6, 29, 140, 704, 3732, 20915, 123832, 773051, 5076174, 34973432, 252212600, 1899483793, 14908277490, 121701247649, 1031472019760, 9061405440156, 82384690078948, 774102548613907, 7507335441107420, 75055820357153647, 772694054961218802, 8182814265240466788
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| LINKS
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Toufik Mansour and Mark Shattuck, <a href="https://doi.org/10.1080/10236198.2020.1739275">Counting set partitions by the number of movable letters</a>, Journal of Difference Equations and Applications, 26:3, 384-403, (2020). See Theorem 8.
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