This site is supported by donations to The OEIS Foundation.

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A071249 GCD(n, R(n)) > 1, where R(n) (A004086) is the digit reversal of n. 4
 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 15, 18, 20, 21, 22, 24, 26, 27, 28, 30, 33, 36, 39, 40, 42, 44, 45, 46, 48, 50, 51, 54, 55, 57, 60, 62, 63, 64, 66, 68, 69, 70, 72, 75, 77, 78, 80, 81, 82, 84, 86, 87, 88, 90, 93, 96, 99, 101, 102, 105, 108, 110, 111, 114, 117, 120, 121 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A055483(a(n)) > 1. - Reinhard Zumkeller, Jun 18 2013 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 MATHEMATICA Select[ Range[125], GCD[ #, FromDigits[ Reverse[ IntegerDigits[ # ]]]] > 1 & ] PROG (Haskell) a071249 n = a071249_list !! (n-1) a071249_list = filter ((> 1) . a055483) [1..] -- Reinhard Zumkeller, Jun 18 2013 CROSSREFS Cf. A226778 (complement). Sequence in context: A128870 A256476 A154771 * A084433 A084434 A034709 Adjacent sequences:  A071246 A071247 A071248 * A071250 A071251 A071252 KEYWORD base,nonn AUTHOR Amarnath Murthy, May 21 2002 EXTENSIONS Edited by Robert G. Wilson v, Jun 07 2002 STATUS approved

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

Content is available under The OEIS End-User License Agreement .