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A023735 Numbers with exactly 2 3's in their base-5 expansion. 4
18, 43, 68, 78, 83, 88, 90, 91, 92, 94, 98, 118, 143, 168, 193, 203, 208, 213, 215, 216, 217, 219, 223, 243, 268, 293, 318, 328, 333, 338, 340, 341, 342, 344, 348, 368, 378, 383, 388, 390, 391, 392, 394, 398, 403, 408, 413, 415, 416, 417, 419, 423 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

MAPLE

seq(`if`(numboccur(3, convert(n, base, 5))=2, n, NULL), n=0..450); # Nathaniel Johnston, Jun 27 2011

MATHEMATICA

Select[ Range[ 450 ], (Count[ IntegerDigits[ #, 5 ], 3 ]==2)& ]

Select[Range[500], DigitCount[#, 5, 3]==2&] (* Harvey P. Dale, Mar 24 2021 *)

CROSSREFS

Cf. A023733, A023734.

Sequence in context: A252747 A067750 A043362 * A045300 A045189 A044095

Adjacent sequences:  A023732 A023733 A023734 * A023736 A023737 A023738

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 25 04:19 EDT 2021. Contains 348237 sequences. (Running on oeis4.)