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A259057
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One-third of the even-indexed entries of A259056.
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1
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-1, 20, -560, 20160, -887040, 46126080, -2767564800, 188194406400, -14302774886400, 1201433090457600, -110531844322099200, 11053184432209920000, -1193743918678671360000, 138474294566725877760000, -17170812526274008842240000
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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It is conjectured that this is an integer sequence.
For the odd-indexed entries of A259056 see
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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