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 A235228 Numbers whose sum of digits is 18. 32
 99, 189, 198, 279, 288, 297, 369, 378, 387, 396, 459, 468, 477, 486, 495, 549, 558, 567, 576, 585, 594, 639, 648, 657, 666, 675, 684, 693, 729, 738, 747, 756, 765, 774, 783, 792, 819, 828, 837, 846, 855, 864, 873, 882, 891, 909, 918, 927, 936, 945, 954, 963 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A007953(a(n)) = 18; number of repdigits = #{99,666,333333,222222222,1^18} = A242627(18) = 5. - Reinhard Zumkeller, Jul 17 2014 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 FORMULA a(n) = 9*A279769(n). - M. F. Hasler, Dec 23 2016 MATHEMATICA Select[Range[1000], Total[IntegerDigits[#]] == 18 &] PROG (Magma) [n: n in [1..1000] | &+Intseq(n) eq 18]; (Haskell) a235228 n = a235228_list !! (n-1) a235228_list = filter ((== 18) . a007953) [0..] -- Reinhard Zumkeller, Jul 17 2014 CROSSREFS Cf. A052217 - A052224, A061423, A143164, A166311, A166370, A166459. Cf. A011557 (1), A052216 (2), A052217 (3), A052218 (4), A052219 (5), A052220 (6), A052221 (7), A052222 (8), A052223 (9), A052224 (10), A166311 (11), A235151 (12), A143164 (13), A235225(14), A235226 (15), A235227 (16), A166370 (17), A166459 (19), A235229 (20). Cf. A242614, A242627. Sequence in context: A075815 A075814 A320707 * A157947 A097599 A033674 Adjacent sequences: A235225 A235226 A235227 * A235229 A235230 A235231 KEYWORD nonn,base,easy AUTHOR Vincenzo Librandi, Jan 05 2014 STATUS approved

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Last modified February 5 02:12 EST 2023. Contains 360082 sequences. (Running on oeis4.)