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 A230634 Numbers n such that m + (sum of digits in base-4 representation of m) = n has exactly two solutions. 11
 17, 19, 21, 34, 36, 38, 51, 53, 55, 65, 67, 70, 72, 82, 84, 86, 99, 101, 103, 116, 118, 120, 130, 132, 135, 137, 147, 149, 151, 164, 166, 168, 181, 183, 185, 195, 197, 200, 202, 212, 214, 216, 229, 231, 233, 246, 248, 250, 257, 261, 262, 263, 267, 274, 276, 278, 291, 293, 295, 308, 310, 312, 322, 324, 327, 329, 339 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Donovan Johnson, Table of n, a(n) for n = 1..10000 Index entries for Colombian or self numbers and related sequences MATHEMATICA etsQ[n_]:=Count[#+Total[IntegerDigits[#, 4]]&/@Range[n-1], n]==2; Select[ Range[ 350], etsQ] (* Harvey P. Dale, May 25 2016 *) CROSSREFS Related base-4 sequences: A053737, A230631, A230632, A010064, A230633, A230634, A230635, A230636, A230637, A230638, A010065 (trajectory of 1) Sequence in context: A194389 A030127 A115849 * A354880 A054484 A054796 Adjacent sequences: A230631 A230632 A230633 * A230635 A230636 A230637 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Oct 30 2013 STATUS approved

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Last modified February 29 17:14 EST 2024. Contains 370427 sequences. (Running on oeis4.)