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A077731
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Smallest square beginning with the reverse concatenation of first n natural numbers.
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1
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1, 2116, 321489, 43217476, 543216249, 65432105209, 76543216214404, 87654321389325625, 9876543214442601636, 109876543213216782564, 11109876543211013634144016, 12111098765432180129777502784
(list; graph; refs; listen; history; internal format)
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