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A031999 Numbers whose base-4 digits are in nonincreasing order. 3
1, 2, 3, 4, 5, 8, 9, 10, 12, 13, 14, 15, 16, 20, 21, 32, 36, 37, 40, 41, 42, 48, 52, 53, 56, 57, 58, 60, 61, 62, 63, 64, 80, 84, 85, 128, 144, 148, 149, 160, 164, 165, 168, 169, 170, 192, 208, 212, 213, 224, 228, 229, 232, 233, 234, 240 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Identical to A023760 apart from its first term. - Charles R Greathouse IV, May 03 2016
LINKS
MATHEMATICA
Select[Range[300], Max[Differences[IntegerDigits[#, 4]]] < 1 &] (* Harvey P. Dale, Apr 27 2017 *)
CROSSREFS
Cf. A007090, A023760, A023786 (subset).
Sequence in context: A329296 A356713 A032867 * A023760 A032901 A260113
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified February 24 04:32 EST 2024. Contains 370288 sequences. (Running on oeis4.)