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Search: id:A024489
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| A024489 |
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a(n) = (1/(9n-3))*M(3n; n,n,n), where M() is a multinomial coefficient. |
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| 1, 6, 70, 1050, 18018, 336336, 6651216, 137181330, 2921454250, 63804560820, 1422156202740, 32235540595440
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