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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
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
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.)