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 A004178 Omit 3's from n. 3
 0, 1, 2, 0, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1, 14, 15, 16, 17, 18, 19, 20, 21, 22, 2, 24, 25, 26, 27, 28, 29, 0, 1, 2, 0, 4, 5, 6, 7, 8, 9, 40, 41, 42, 4, 44, 45, 46, 47, 48, 49, 50, 51, 52, 5, 54, 55, 56, 57, 58, 59, 60, 61, 62, 6, 64, 65, 66, 67, 68, 69, 70, 71, 72, 7, 74 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n) = 0 when n = 0 or when n is a 3-repdigit (A002277). a(n) = n when it contains no 3 among its digits. - Alonso del Arte, Oct 16 2012 LINKS EXAMPLE a(13) = 1 because after deleting the 3 from its base 10 representation, we're left with 1. a(14) = 14 because there are no 3s to delete. MATHEMATICA Table[FromDigits[DeleteCases[IntegerDigits[n], 3]], {n, 0, 74}] (* Alonso del Arte, Oct 16 2012 *) PROG (PARI) a(n)=subst(Pol(select(k->k-3, digits(n))), 'x, 10) \\ Charles R Greathouse IV, Oct 16 2012 CROSSREFS Cf. A004722, A052405. Sequence in context: A004482 A111677 A049271 * A068333 A121451 A096984 Adjacent sequences:  A004175 A004176 A004177 * A004179 A004180 A004181 KEYWORD nonn,base,easy AUTHOR STATUS approved

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