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A023694 Numbers with exactly 3 1's in ternary expansion. 2
13, 31, 37, 39, 41, 43, 49, 67, 85, 91, 93, 95, 97, 103, 109, 111, 113, 115, 117, 119, 123, 125, 127, 129, 131, 133, 139, 145, 147, 149, 151, 157, 175, 193, 199, 201, 203, 205, 211, 229, 247, 253, 255, 257, 259, 265, 271, 273, 275 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

Select[ Range[ 270 ], (Count[ IntegerDigits[ #, 3 ], 1 ]==3)& ]

CROSSREFS

Sequence in context: A156532 A227435 A046414 * A038465 A103665 A040050

Adjacent sequences:  A023691 A023692 A023693 * A023695 A023696 A023697

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 18 01:01 EDT 2018. Contains 316297 sequences. (Running on oeis4.)