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A066623
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Concatenation of squares in increasing order up to the n-th and then in decreasing order.
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1, 141, 14941, 14916941, 149162516941, 1491625362516941, 14916253649362516941, 149162536496449362516941, 1491625364964816449362516941, 149162536496481100816449362516941
(list; graph; refs; listen; history; internal format)
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