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A045084 Numbers n with property that in base 4 representation the numbers of 0's and 3's are 4 and 3, respectively. 1
12303, 12339, 12348, 12483, 12492, 12528, 13059, 13068, 13104, 13248, 15363, 15372, 15408, 15552, 16128, 16447, 16591, 16627, 16636, 17167, 17203, 17212, 17347, 17356, 17392, 19471, 19507, 19516, 19651, 19660 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

Res:= NULL:

for d from 7 to 8 do

  for i from 0 to d-7 do

    L:= [0$4, 3$3, 1$i, 2$(d-7-i)];

    P:= remove(t -> t[-1]=0, combinat:-permute(L));

    Res:= Res, op(map(t -> add(t[i]*4^(i-1), i=1..d), P));

od od:

sort([Res]); # Robert Israel, Feb 27 2018

CROSSREFS

Sequence in context: A205359 A061745 A251776 * A250856 A242716 A077186

Adjacent sequences:  A045081 A045082 A045083 * A045085 A045086 A045087

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 14 12:14 EST 2019. Contains 329113 sequences. (Running on oeis4.)