PermPal Database

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Generating function in Maple format
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First 15 coefficients

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Av(12345, 12354, 21345, 21354) Av(12354, 12453, 21354, 21453) Av(12435, 12453, 21435, 21453) Av(12453, 12543, 21453, 21543) Av(13425, 13452, 31425, 31452) Av(13452, 13542, 23451, 23541) Av(13452, 13542, 31452, 31542) Av(13524, 13542, 31524, 31542) Av(13542, 14532, 23541, 24531) Av(14352, 15342, 24351, 25341)