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Search: id:A069024
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| A069024 |
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Palindromic in base 2 as well as in base 10 (initial zeros may be prepended). |
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+0
1
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| 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; listen)
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OFFSET
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1,2
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EXAMPLE
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66 in base 2 is 1000010 which is palindromic if rewritten as 01000010.
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MATHEMATICA
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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]&]
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CROSSREFS
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Cf. A007632.
Sequence in context: A038367 A108652 A140665 this_sequence A107085 A032945 A052018
Adjacent sequences: A069021 A069022 A069023 this_sequence A069025 A069026 A069027
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 02 2002
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EXTENSIONS
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Edited by Dean Hickerson (dean(AT)math.ucdavis.edu), Apr 06 2002
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