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A023759 Nialpdromes: digits in base 3 are in nonincreasing order. 1
0, 1, 2, 3, 4, 6, 7, 8, 9, 12, 13, 18, 21, 22, 24, 25, 26, 27, 36, 39, 40, 54, 63, 66, 67, 72, 75, 76, 78, 79, 80, 81, 108, 117, 120, 121, 162, 189, 198, 201, 202, 216, 225, 228, 229, 234, 237, 238, 240, 241, 242, 243, 324, 351, 360, 363, 364, 486, 567, 594 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..1000 (first 800 terms from Vincenzo Librandi)

MATHEMATICA

Select[Range[0, 4000], Max[Differences[IntegerDigits[#, 3]]] <= 0 &] (* Vincenzo Librandi, Dec 26 2012 *)

Select[Range[0, 600], GreaterEqual@@IntegerDigits[#, 3]&] (* Ray Chandler, Jan 06 2014 *)

PROG

(PARI) is(n)=n=digits(n, 3); n==vecsort(n, , 4) \\ Charles R Greathouse IV, Mar 31 2014

CROSSREFS

Sequence in context: A031990 A023747 A031998 * A004742 A100290 A140181

Adjacent sequences:  A023756 A023757 A023758 * A023760 A023761 A023762

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 23 03:24 EDT 2014. Contains 248411 sequences.