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Search: id:A062118
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| A062118 |
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Numbers n such that n^2 has n as its middle digits. |
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+0
2
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| 1, 50, 60, 250, 3792, 7600, 376000, 495475, 625000, 971582, 66952741, 93760000, 177656344, 3199268655
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Computed by Robert Israel.
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EXAMPLE
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a(5)=3792 because 3792^2 = 14379264 has 3792 as its middle digits.
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MATHEMATICA
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Do[ If[ StringPosition[ ToString[n^2], ToString[n]] [[1, 1]] == (Ceiling[ Log[10, n^2] ] - Ceiling[ Log[10, n] ])/2 + 1, Print[n] ], {n, 1, 10^9} ]
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CROSSREFS
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n^2 is given in A062120.
Sequence in context: A046832 A046834 A046836 this_sequence A109552 A007692 A025285
Adjacent sequences: A062115 A062116 A062117 this_sequence A062119 A062120 A062121
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KEYWORD
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nonn,base,nice
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AUTHOR
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Brian Wallace (wallacebrianedward(AT)yahoo.co.uk), Jun 28 2001
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EXTENSIONS
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Corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 08 2001
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