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 A054683 Numbers whose sum of digits is even. 19
 0, 2, 4, 6, 8, 11, 13, 15, 17, 19, 20, 22, 24, 26, 28, 31, 33, 35, 37, 39, 40, 42, 44, 46, 48, 51, 53, 55, 57, 59, 60, 62, 64, 66, 68, 71, 73, 75, 77, 79, 80, 82, 84, 86, 88, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 110, 112, 114, 116, 118, 121, 123, 125, 127, 129, 130 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Union of A179082 and A179084; A179081(a(n)) = 0. - Reinhard Zumkeller, Jun 28 2010 Integers with an even number of odd digits. - Bernard Schott, Nov 18 2022 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 Index entries for 10-automatic sequences. Index entries for Colombian or self numbers and related sequences FORMULA a(n) = 2*n for the first 5 terms; a(n) = 2*n + 1 for the next 5 terms (recurrence). I.e., for n > 0, a(n + 10) = a(n) + 20. - David A. Corneth, Jun 05 2016 EXAMPLE 0, 2, 4, 6, 8, 11 (2), 13 (4), 15 (6), 17 (8), 19 (10), 20 (2), 22 (4) and so on. MATHEMATICA Select[Range[0, 200], EvenQ[Total[IntegerDigits[#]]]&] (* Harvey P. Dale, Jan 04 2015 *) PROG (PARI) is(n)=my(d=digits(n)); sum(i=1, #d, d[i])%2==0 \\ Charles R Greathouse IV, Aug 09 2013 (PARI) a(n) = n--; m = 10*(n\5); s=sumdigits(m); m + (1-(s-1)%2) + 2*(n%5) \\ David A. Corneth, Jun 05 2016 (Python) A054683_list = [i for i in range(10**3) if not sum(int(d) for d in str(i)) % 2] # Chai Wah Wu, Mar 17 2016 CROSSREFS Cf. A179081, A270264. Subsequences: A014263, A099814, A179082, A179084. Similar: A054684 (with an odd number of odd digits), A356929 (with an even number of even digits). Sequence in context: A128403 A205556 A051244 * A327255 A287777 A249099 Adjacent sequences: A054680 A054681 A054682 * A054684 A054685 A054686 KEYWORD nonn,easy,base AUTHOR Odimar Fabeny, Apr 19 2000 EXTENSIONS More terms from James A. Sellers, Apr 19 2000 Example corrected by David A. Corneth, Jun 05 2016 STATUS approved

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Last modified February 21 16:55 EST 2024. Contains 370237 sequences. (Running on oeis4.)