This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A052218 Numbers whose sum of digits is 4. 34
 4, 13, 22, 31, 40, 103, 112, 121, 130, 202, 211, 220, 301, 310, 400, 1003, 1012, 1021, 1030, 1102, 1111, 1120, 1201, 1210, 1300, 2002, 2011, 2020, 2101, 2110, 2200, 3001, 3010, 3100, 4000, 10003, 10012, 10021, 10030, 10102, 10111, 10120, 10201, 10210 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A007953(a(n)) = 4; number of repdigits = #{4,22,1111} = A242627(4) = 3. - Reinhard Zumkeller, Jul 17 2014 LINKS Vincenzo Librandi and T. D. Noe, Table of n, a(n) for n = 1..1001 (first 210 terms from Vincenzo Librandi) MATHEMATICA Select[Range[10^5], Total[IntegerDigits[#]] == 4 &] (* Vincenzo Librandi, Mar 07 2013 *) Union[Flatten[Table[FromDigits /@ Permutations[PadRight[s, 11]], {s, IntegerPartitions[4]}]]] (* T. D. Noe, Mar 08 2013 *) PROG (MAGMA) [n: n in [1..10300] | &+Intseq(n) eq 4 ]; // Vincenzo Librandi, Mar 07 2013 (Haskell) a052218 n = a052218_list !! (n-1) a052218_list = filter ((== 4) . a007953) [0..] -- Reinhard Zumkeller, Jul 17 2014 (PARI) isok(n) = sumdigits(n) == 4; \\ Michel Marcus, Dec 28 2015 CROSSREFS Cf. A007953. Cf. A011557 (1), A052216 (2), A052217 (3), 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), A235228 (18), A166459 (19), A235229 (20). Cf. A242614, A242627. Sequence in context: A043469 A067396 A017209 * A183148 A202089 A256390 Adjacent sequences:  A052215 A052216 A052217 * A052219 A052220 A052221 KEYWORD nonn,base,easy AUTHOR Henry Bottomley, Feb 01 2000 EXTENSIONS Offset changed from Bruno Berselli, Mar 07 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)