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A118029
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a(0)=1. a(n) = a(n-1) + (smallest integer which is >= n and occurs among the earlier terms of the sequence).
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4
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1, 2, 4, 8, 12, 20, 28, 36, 44, 56, 68, 80, 92, 112, 132, 152, 172, 192, 212, 232, 252, 280, 308, 336, 364, 392, 420, 448, 476, 512, 548, 584, 620, 656, 692, 728, 764, 808, 852, 896, 940, 984, 1028, 1072, 1116, 1172, 1228, 1284, 1340, 1396, 1452, 1508, 1564
(list; graph; refs; listen; history; internal format)
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