| 0, 1, 4, 19, 52, 40, 280, 1231, 4243, 3457, 43882, 11929, 437797, 407374, 2851618, 10395388, 1023181, 7162267, 50135869, 738371572, 1681816603, 1312363018, 9186541126, 1543668664, 104948859475, 452212479844, 2318198749465, 6059927932939, 4291508105638, 30040556739466
(list; graph; listen)
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