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A108488
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Expansion of 1/sqrt(1-2x-3x^2-4x^3+4x^4).
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1, 1, 3, 9, 23, 69, 203, 601, 1815, 5493, 16731, 51225, 157367, 485093, 1499499, 4646233, 14427095, 44880981, 139849979, 436419737, 1363713015, 4266417221, 13362194571, 41891406681, 131452430999, 412835452213, 1297543367835
(list; graph; refs; listen; history; internal format)
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