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 A029730 Numbers that are palindromic in base 16. 9
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255, 257, 273, 289, 305, 321, 337, 353, 369, 385, 401, 417, 433, 449, 465, 481, 497, 514, 530, 546, 562, 578, 594, 610, 626, 642 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 P. De Geest, Palindromic numbers beyond base 10 Eric Weisstein's World of Mathematics, Palindromic Number Eric Weisstein's World of Mathematics, Hexadecimal Wikipedia, Palindromic number Wikipedia, Hexadecimal EXAMPLE 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 11, 22, 33, 44, 55, 66, 77, 88, 99, AA, BB, CC, DD, EE, FF, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191,1A1, 1B1, 1C1, 1D1, 1E1, 1F1, 202, 212, 222, 232, 242, 252, 262, 272, 282, 292, 2A2, 2B2, 2C2, 2D2, 2E2, 2F2, 303, 313, 323, 333, 343, 353, 363, 373, 383, 393, 3A3, 3B3, 3C3, 3D3, 3E3, 3F3, 404, ... - Reinhard Zumkeller, Sep 23 2015 MATHEMATICA palindromicQ[n_, b_] := Module[{i = IntegerDigits[n, b]}, i == Reverse[i]]; Select[Range[1000], palindromicQ[#, 16] &] (* Vladimir Joseph Stephan Orlovsky, Jul 08 2009 *) PROG (Haskell) a029730 n = a029730_list !! (n-1) a029730_list = map (foldr (\h v -> 16 * v + h) 0) \$                    filter (\xs -> xs == reverse xs) a262437_tabf -- Reinhard Zumkeller, Sep 23 2015 (PARI) isok(n) = my(v=digits(n, 16)); v == Vecrev(v); \\ Michel Marcus, Sep 30 2018 CROSSREFS Cf. A029731 (also palindromic in decimal), A056962, A262437. Sequence in context: A048313 A043719 A296759 * A297289 A048327 A048340 Adjacent sequences:  A029727 A029728 A029729 * A029731 A029732 A029733 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified May 24 19:14 EDT 2020. Contains 334580 sequences. (Running on oeis4.)