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A277964 Numbers whose largest decimal digit is 2. 8
2, 12, 20, 21, 22, 102, 112, 120, 121, 122, 200, 201, 202, 210, 211, 212, 220, 221, 222, 1002, 1012, 1020, 1021, 1022, 1102, 1112, 1120, 1121, 1122, 1200, 1201, 1202, 1210, 1211, 1212, 1220, 1221, 1222, 2000, 2001, 2002, 2010, 2011, 2012, 2020, 2021, 2022 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Number of terms less than 10^n is 3^n-2^n, i.e., A001047(n). - Chai Wah Wu, Nov 06 2016 [extended by Felix Fröhlich, Nov 07 2016]

Numbers n such that A054055(n) = 2. - Felix Fröhlich, Nov 07 2016

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..10000 (first 1000 terms from Colin Barker)

MAPLE

N:= 6: # to get all terms of at most N digits

R:= 2: B:= {1}: C:= {1, 2}:

for  d from 2 to N do B:= map(t -> (10*t, 10*t+1), B);

C:= map(t -> (10*t, 10*t+1, 10*t+2), C);

R:= R, op(sort(convert(C minus B, list)))

od:

R; # Robert Israel, Nov 07 2016

MATHEMATICA

A277964Q = Max[IntegerDigits[#]] == 2 &; Select[Range[2000], A277964Q] (* JungHwan Min, Nov 06 2016 *)

PROG

(PARI) L=List(); for(n=1, 10000, if(vecmax(digits(n))==2, listput(L, n))); Vec(L)

(GAP) Filtered([1..2100], n->Maximum(ListOfDigits(n))=2); # Muniru A Asiru, Mar 01 2019

CROSSREFS

Cf. A007088, A277965, A277966.

Sequence in context: A303880 A174977 A011532 * A043497 A051804 A121022

Adjacent sequences:  A277961 A277962 A277963 * A277965 A277966 A277967

KEYWORD

nonn,base

AUTHOR

Colin Barker, Nov 06 2016

STATUS

approved

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Last modified February 27 04:40 EST 2021. Contains 341649 sequences. (Running on oeis4.)