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 A124177 Consider the map f that sends n to n + (sum of even digits of n) - (sum of odd digits of n). Sequence gives numbers n such that f^(k)(n) = n for some k. 16
 0, 22, 26, 27, 34, 35, 44, 49, 52, 63, 66, 78, 79, 81, 88, 99, 104, 107, 108, 112, 115, 121, 126, 133, 134, 143, 144, 151, 156, 165, 178, 187, 211, 224, 229, 232, 233, 283, 290, 314, 336, 341, 358, 363, 385, 413, 431, 467, 470, 489, 492, 516, 538, 561, 583, 615 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Terms computed by Theunis de Jong. Subsequence A036301 lists fixed points of the map f = A304440. - M. F. Hasler, May 18 2018 LINKS Eric Angelini, Table of n, a(n) for n = 1..182 Eric Angelini, Self-loopers. EXAMPLE 26 and 27 loop on themselves -- but 28 doesn't. 26 -> 34 -> 35 -> 27 -> 22 -> 26 27 -> 22 -> 26 -> 34 -> 35 -> 27 28 -> 38 -> 43 -> 44 -> 52 -> 49 -> 44. PROG (PARI) is(n, S=List())={until(setsearch(Set(S), n=A304440(n)), listput(S, n)); n==S[1]} \\ M. F. Hasler, May 18 2018 CROSSREFS Cf. A124176, A036301, A304439, A304440, A071650, A071648, A071649. Sequence in context: A227408 A303304 A234540 * A260990 A260991 A160078 Adjacent sequences:  A124174 A124175 A124176 * A124178 A124179 A124180 KEYWORD base,easy,nonn AUTHOR Eric Angelini, Dec 04 2006 STATUS approved

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Last modified May 30 08:43 EDT 2020. Contains 334712 sequences. (Running on oeis4.)