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A014288
[ Sum k!/2, k=0..n ], or floor(
A003422
(n+1)/2 ).
+0
7
0, 1, 2, 5, 17, 77, 437, 2957, 23117, 204557, 2018957, 21977357, 261478157, 3374988557, 46964134157, 700801318157, 11162196262157, 189005910310157, 3390192763174157, 64212742967590157, 1280663747055910157
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Maintained by
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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.
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