The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A069024 Palindromic in base 2 as well as in base 10 (initial zeros may be prepended). 0
 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 33, 40, 60, 66, 80, 90, 99, 252, 272, 292, 313, 330, 585, 626, 660, 717, 990, 2112, 2720, 2772, 2920, 4224, 5850, 6336, 7447, 7470, 8448, 8580, 9009, 15351, 21120, 22122, 25752, 32223, 39993, 40904, 42240, 44244 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE 66 in base 2 is 1000010 which is palindromic if rewritten as 01000010. MATHEMATICA pal[n_, b_] := (z=IntegerDigits[n, b]) == Reverse[z]; extpal[n_, b_] := If[Mod[n, b]>0, pal[n, b], extpal[n/b, b]]; Select[Range[50000], extpal[ #, 10]&&extpal[ #, 2]&] CROSSREFS Cf. A007632. Sequence in context: A161350 A108652 A140665 * A175396 A107085 A212499 Adjacent sequences:  A069021 A069022 A069023 * A069025 A069026 A069027 KEYWORD nonn,base AUTHOR Amarnath Murthy, Apr 02 2002 EXTENSIONS Edited by Dean Hickerson, Apr 06 2002 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 August 11 08:05 EDT 2020. Contains 336422 sequences. (Running on oeis4.)