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Search: id:A124996
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| A124996 |
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a(n) = constant term in expansion of Prod_{ k = 1..n } (x^k + 1/x^k)^4. |
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2
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| 1, 6, 44, 426, 4658, 55260, 689508, 8914872, 118374410, 1604658420, 22115171280, 308940507202, 4364729023812, 62256518307724, 895294865045296, 12966655239260890, 188967013096930258, 2769003814616561636, 40773380119956434784, 603008173331642200144
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