A044972 - OEIS

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A044972

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

10, 12, 32, 34, 38, 42, 46, 48, 58, 64, 66, 98, 104, 106, 116, 128, 132, 140, 142, 146, 150, 154, 156, 176, 178, 184, 194, 196, 200, 204, 208, 210, 220, 226, 228, 296, 314, 320, 322, 350, 386, 398, 402, 422, 428, 430, 440, 452

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

OFFSET

1,1

LINKS

David A. Corneth, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[500], DigitCount[#, 3, 0]==1&&DigitCount[#, 3, 1]==2&] (* Harvey P. Dale, Aug 19 2019 *)

PROG

(PARI) is(n)=my(d=digits(n, 3), fr=vector(3)); for(i=1, #d, fr[d[i]+1]++); fr[1]==1&&fr[2]==2 \\ David A. Corneth, Aug 19 2019

CROSSREFS

Cf. A007089, A024023.

Sequence in context: A015728 A080470 A087217 * A132313 A324745 A367148

Adjacent sequences: A044969 A044970 A044971 * A044973 A044974 A044975

KEYWORD

nonn,easy,base

AUTHOR

Clark Kimberling

STATUS

approved