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1, 25, 405, 5405, 64661, 721725, 7683685, 79078285, 793624821, 7813101725, 75772440965, 726132366765, 6891899656981, 64900354798525, 607206802510245, 5650395374640845, 52342063252985141, 483011998315708125
(list; graph; refs; listen; history; internal format)
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