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2, 5, 14, 32, 71, 149, 304, 604, 1177, 2256, 4266, 7974, 14758, 27079, 49312, 89200, 160393, 286867, 510596, 904838, 1597091, 2808672, 4922820, 8601660, 14986730, 26042201, 45141410, 78067712, 134719931, 232014593, 398818552, 684322432
(list; graph; refs; listen; history; internal format)
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