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Search: id:A025138
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| A025138 |
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a(n) = (1/2)*(3rd elementary symmetric function of C(n,0), C(n,1), ..., C(n,[ n/2 ]). |
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| 12, 25, 1155, 3136, 89012, 282339, 6356460, 22384516, 437787537, 1663878008, 29545748596, 119083774720, 1968978205492, 8317456369783
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