The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A023694 Numbers with exactly 3 1's in ternary expansion. 4
 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, 277, 279, 281, 285, 287, 289 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Alois P. Heinz, Table of n, a(n) for n = 1..10000 MAPLE q:= n-> numboccur(1, convert(n, base, 3))=3: select(q, [\$1..300])[]; # Alois P. Heinz, Mar 15 2020 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 3 12:51 EST 2024. Contains 370512 sequences. (Running on oeis4.)