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A077364
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Largest n-digit square whose external digits as well as internal digits form a square, or 0 if no such number exists.
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1
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9, 81, 841, 0, 38416, 405769, 8003241, 82246761, 0, 1021697296, 86925318561, 119013960256, 6323524974244, 60207636572164, 472453565584009, 0, 85832135162345961, 0, 0, 0, 617801116917258936964, 3633816317608493633296, 0
(list; graph; refs; listen; history; internal format)
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