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1, 2, 7, 16, 39, 55, 94, 431, 10869, 43907, 54776, 98683, 252142, 602967, 2061043, 4725053, 238313693, 481352439, 1682371010, 3846094459, 9374559928, 13220654387, 22595214315, 103601511647, 2612633005490
(list; graph; refs; listen; history; internal format)
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