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101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101, 1201, 1301, 1401, 1501, 1601, 1701, 1801, 1901, 2001, 2101, 2201, 2301, 2401, 2501, 2601, 2701, 2801, 2901, 3001, 3101, 3201, 3301, 3401, 3501, 3601, 3701, 3801, 3901, 4001, 4101, 4201, 4301, 4401
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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The identity (100*n+1)^2-(100*n^2+2*n)*10^2 = 1 can be written as a(n)^2-A158127(n)*10^2 = 1. - Vincenzo Librandi, Feb 11 2012
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(Magma) I:=[101, 201]; [n le 2 select I[n] else 2*Self(n-1)-Self(n-2): n in [1..50]]; \\ Vincenzo Librandi, Feb 11 2012
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CROSSREFS
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KEYWORD
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nonn,easy,changed
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AUTHOR
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STATUS
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approved
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