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 A230641 a(n) = n + (sum of digits in base-3 representation of n). 13
 0, 2, 4, 4, 6, 8, 8, 10, 12, 10, 12, 14, 14, 16, 18, 18, 20, 22, 20, 22, 24, 24, 26, 28, 28, 30, 32, 28, 30, 32, 32, 34, 36, 36, 38, 40, 38, 40, 42, 42, 44, 46, 46, 48, 50, 48, 50, 52, 52, 54, 56, 56, 58, 60, 56, 58, 60, 60, 62, 64, 64, 66, 68, 66, 68, 70, 70, 72, 74, 74, 76, 78, 76, 78, 80, 80, 82, 84, 84, 86, 88, 82 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS The image of this sequence is the set of nonnegative even numbers (A005843). Joshi (1973) proved that the sequence of base-q self numbers (analogous to A003052) is the sequence of odd numbers (A005408) for all odd q. - Amiram Eldar, Nov 28 2020 REFERENCES V. S. Joshi, Ph.D. dissertation, Gujarat Univ., Ahmedabad (India), October, 1973. József Sándor and Borislav Crstici, Handbook of Number theory II, Kluwer Academic Publishers, 2004, Chapter 4, p. 384-386. LINKS Donovan Johnson, Table of n, a(n) for n = 0..10000 FORMULA a(n) = n + A053735(n). - Amiram Eldar, Nov 28 2020 MATHEMATICA Table[n + Plus @@ IntegerDigits[n, 3], {n, 0, 100}] (* Amiram Eldar, Nov 28 2020 *) PROG (Haskell) a230641 n = a053735 n + n  -- Reinhard Zumkeller, May 19 2015 CROSSREFS Related base-3 sequences: A053735, A134451, A230641, A230642, A230643, A230853, A230854, A230855, A230856, A230639, A230640, A010063 (trajectory of 1) Cf. A228088, A010061, A230091, A230092, A227915. Sequence in context: A159634 A186690 A002131 * A063200 A063224 A023847 Adjacent sequences:  A230638 A230639 A230640 * A230642 A230643 A230644 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Oct 31 2013 STATUS approved

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Last modified April 18 05:11 EDT 2021. Contains 343072 sequences. (Running on oeis4.)