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A247885
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Smallest square that remains a square when prefixed with n.
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3
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225, 25, 4225, 9, 625, 4, 225, 1, 3025, 5625, 9025, 1, 225, 4, 625, 9, 64, 49, 36, 25, 16, 5625, 87025, 8850625, 889914313729282379150390625, 9669767640625, 225, 9, 16, 25, 36, 4, 64, 81, 15625, 1, 1456358697509765625, 142604475904693603515625, 1050625
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OFFSET
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1,1
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LINKS
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PROG
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(PARI)
a(n)=k=1; while(!issquare(eval(concat(Str(n), Str(k^2)))), k++); k^2
vector(24, n, a(n))
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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