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Search: id:A014180
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| A014180 |
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Sum( binomial(n,k)^3*binomial(n+k,k)^2,k=0..n). |
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1
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| 1, 5, 109, 3533, 133501, 5629505, 254899765, 12129399245, 599084606845, 30455459491505, 1584249399505609, 83970120618566825, 4520585403820052581, 246592348286170615097, 13603606921687170927109
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