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 A110724 {n concatenate R(n)} + {R(n) concatenate n}, where R(n) = digit reversal of n. 4
 0, 22, 44, 66, 88, 110, 132, 154, 176, 198, 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999, 11110, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999, 11110, 12221, 3333, 4444, 5555, 6666, 7777, 8888, 9999, 11110, 12221, 13332, 4444, 5555, 6666 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 FORMULA When n has one digit, a(n)=22*n. When n has two digits, a(n)= 1111*x + 1111*y. (Here x,y are the digits of n.) - Keith Schneider, Jun 16 2007 EXAMPLE a(12) = 1221 + 2112 = 3333. a(68) = 6886 + 8668 = 15554. MATHEMATICA Table[FromDigits[Join[IntegerDigits[n], Reverse[IntegerDigits[n]]]] + FromDigits[Join[Reverse[IntegerDigits[n]], IntegerDigits[n]]], {n, 0, 50}] (* Stefan Steinerberger, Jun 17 2007 *) CROSSREFS Cf. A110722, A110723, A110725. Sequence in context: A269310 A015799 A008604 * A277051 A308125 A061832 Adjacent sequences:  A110721 A110722 A110723 * A110725 A110726 A110727 KEYWORD base,easy,nonn,less AUTHOR Amarnath Murthy, Aug 09 2005 EXTENSIONS Corrected and extended by Stefan Steinerberger, Jun 17 2007 STATUS approved

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Last modified August 19 18:33 EDT 2019. Contains 326133 sequences. (Running on oeis4.)