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A216728
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(2*n)!*((2*n+1)/2)^n/(2*n+1).
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0
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1, 1, 30, 4410, 1837080, 1660289400, 2778905329200, 7757931431250000, 33536835305077104000, 212373276256391153904000, 1887114765997607482496160000, 22736049196010108202227823840000, 361148501823912048339843750000000000, 7389146090843722060953495522716592000000, 190939093198813987007780146685866111584000000
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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