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A023789 Katadromes: digits in base 7 are in strict descending order. 1
0, 1, 2, 3, 4, 5, 6, 7, 14, 15, 21, 22, 23, 28, 29, 30, 31, 35, 36, 37, 38, 39, 42, 43, 44, 45, 46, 47, 105, 154, 161, 162, 203, 210, 211, 217, 218, 219, 252, 259, 260, 266, 267, 268, 273, 274, 275, 276, 301, 308, 309, 315, 316, 317, 322, 323, 324, 325 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

There are 127 terms in this sequence, the last of which is 800667. - Harvey P. Dale, Apr 24 2016

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..127

MATHEMATICA

Select[Range[0, 400], Max[Differences[IntegerDigits[#, 7]]]<0&] (* or *) Rest[FromDigits[#, 7]&/@Select[Flatten[Permutations/@Subsets[ Range[ 0, 6], 7], 1], Max[ Differences[#]]<0&]] (* Harvey P. Dale, Apr 24 2016 *)

CROSSREFS

Sequence in context: A277908 A032862 A032886 * A032996 A032942 A273734

Adjacent sequences:  A023786 A023787 A023788 * A023790 A023791 A023792

KEYWORD

nonn,base,fini,full,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified April 3 00:35 EDT 2020. Contains 333195 sequences. (Running on oeis4.)