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A023760 Nialpdromes: digits in base 4 are in nonincreasing order. 1
0, 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, 244, 245, 248 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1001 (adapted to the new offset from Bruno Berselli)

MATHEMATICA

Select[Range[0, 4000], Max[Differences[IntegerDigits[#, 4]]]<=0&] (* Vincenzo Librandi, Dec 26 2012 *)

Select[Range[0, 250], GreaterEqual@@IntegerDigits[#, 4]&] (* Ray Chandler, Jan 06 2014 *)

CROSSREFS

Sequence in context: A023775 A032867 A031999 * A032901 A005792 A102471

Adjacent sequences:  A023757 A023758 A023759 * A023761 A023762 A023763

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified December 20 23:03 EST 2014. Contains 252290 sequences.