A044971 - OEIS

A044971

Numbers whose base-3 representation contains exactly one 0 and one 1.

3, 11, 15, 19, 21, 35, 47, 51, 59, 61, 65, 69, 73, 75, 107, 143, 155, 159, 179, 185, 187, 197, 209, 213, 221, 223, 227, 231, 235, 237, 323, 431, 467, 479, 483, 539, 557, 563, 565, 593, 629, 641, 645, 665, 671, 673, 683, 695, 699

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Range[1000], DigitCount[#, 3, 0]==DigitCount[#, 3, 1]==1&] (* Harvey P. Dale, Aug 06 2017 *)

CROSSREFS

Cf. A007089.

Sequence in context: A030715 A056247 A039275 * A106374 A075330 A131323

Adjacent sequences: A044968 A044969 A044970 * A044972 A044973 A044974

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved