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Search: id:A110722
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| A110722 |
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{n concatenate R(n)}*{ R(n) concatenate n}, where R(n) = digit reversal of n. |
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+0
6
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| 0, 121, 484, 1089, 1936, 3025, 4356, 5929, 7744, 9801, 110110, 1234321, 2578752, 4143403, 5928274, 7933365, 10158676, 12604207, 15269958, 18155929, 440440, 2578752, 4937284, 7516036, 10315008, 13334200, 16573612, 20033244, 23713096
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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a(n) == 0 (mod 11)
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FORMULA
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When n has one digit a(n)=(11n)^2. When n has two digits a(n)= 110110*x^2 + 1014101*x*y + 110110*y^2. (Here x,y are the digits of n.) - Keith Schneider, Jun 16 2007
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EXAMPLE
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a(13) = 1331*3113 = 4143403.
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CROSSREFS
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Sequence in context: A052082 A062555 A017390 this_sequence A077432 A017654 A036306
Adjacent sequences: A110719 A110720 A110721 this_sequence A110723 A110724 A110725
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 09 2005
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EXTENSIONS
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More terms from Maire B. O'Neill (mbo5001(AT)psu.edu), Sep 18 2005
Corrected by James Greene (jmg482(AT)psu.edu), Apr 07 2006
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