This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A110722 {n concatenate R(n)}*{ R(n) concatenate n}, where R(n) = digit reversal of n. 6
 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; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(n) == 0 (mod 11) LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 FORMULA 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 EXAMPLE a(13) = 1331*3113 = 4143403. MATHEMATICA Table[FromDigits[Join[IntegerDigits[n], Reverse[IntegerDigits[n]]]]* FromDigits[Join[Reverse[IntegerDigits[n]], IntegerDigits[n]]], {n, 0, 50}] (* G. C. Greubel, sep 06 2017 *) CROSSREFS Sequence in context: A052082 A062555 A017390 * A236181 A077432 A017654 Adjacent sequences:  A110719 A110720 A110721 * A110723 A110724 A110725 KEYWORD base,easy,nonn AUTHOR Amarnath Murthy, Aug 09 2005 EXTENSIONS 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 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 7 05:14 EST 2019. Contains 329839 sequences. (Running on oeis4.)