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 A061917 Either a palindrome or becomes a palindrome if trailing 0's are omitted. 16
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 22, 30, 33, 40, 44, 50, 55, 60, 66, 70, 77, 80, 88, 90, 99, 100, 101, 110, 111, 121, 131, 141, 151, 161, 171, 181, 191, 200, 202, 212, 220, 222, 232, 242, 252, 262, 272, 282, 292, 300, 303, 313, 323, 330, 333, 343, 353, 363, 373, 383, 393, 400, 404 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Numbers that are palindromes when written with a suitable number of leading zeros. - Jeppe Stig Nielsen, Jan 17 2022 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA A136522(A004151(a(n))) = 1. - Reinhard Zumkeller, Sep 25 2011 MATHEMATICA PaleQ[n_Integer, base_Integer] := Module[{idn, trim = n/base^IntegerExponent[n, base]}, idn = IntegerDigits[trim, base]; idn == Reverse[idn]]; Select[Range[0, 500], PaleQ[#, 10] &] (* Lei Zhou, Dec 13 2013 *) Join[{0}, Select[Range[500], PalindromeQ[FromDigits[Drop[IntegerDigits[#], -IntegerExponent[#, 10]]]]&]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 27 2017 *) PROG (Haskell) a061917 n = a061917_list !! (n-1) a061917_list = filter chi [0..] where chi x = zs == reverse zs where zs = dropWhile (== '0') \$ reverse \$ show x -- Reinhard Zumkeller, Sep 25 2011 (PARI) isOK(k)=k==0||fromdigits(Vecrev(digits(k)))==k/10^valuation(k, 10) \\ Jeppe Stig Nielsen, Jan 17 2022 (Python) def ispal(s): return s == s[::-1] def ok(n): s = str(n); return ispal(s) or ispal(s.rstrip('0')) print([k for k in range(405) if ok(k)]) # Michael S. Branicky, Jan 17 2022 CROSSREFS Cf. A002113, A057890, A057891. Sequence in context: A281625 A169824 A325152 * A125289 A180482 A193460 Adjacent sequences: A061914 A061915 A061916 * A061918 A061919 A061920 KEYWORD nonn,base,easy,nice AUTHOR N. J. A. Sloane, Jun 27 2001 EXTENSIONS Corrected by Ray Chandler, Jun 08 2009 STATUS approved

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Last modified June 1 17:30 EDT 2023. Contains 363076 sequences. (Running on oeis4.)