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A037871 (1/2)*Sum{|d(i)-e(i)|}, where Sum{d(i)*3^i} is base 3 representation of n and e(i) are digits d(i) in nonincreasing order, for i=0,1,...,m. 2
0, 0, 1, 0, 0, 2, 1, 0, 1, 1, 1, 1, 0, 0, 2, 1, 0, 2, 2, 2, 2, 1, 1, 2, 1, 0, 1, 1, 1, 1, 1, 1, 2, 2, 1, 2, 1, 1, 1, 0, 0, 2, 1, 0, 3, 2, 2, 2, 1, 1, 2, 1, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 1, 1, 2, 1, 1, 4, 3, 2, 3, 2, 1, 2, 1, 0, 1, 1, 1, 1, 1, 1, 2, 2, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..90.

MAPLE

A037871 := proc(n)

    local a, dgs, dgsE ;

    a := 0 ;

    dgs := convert(n, base, 3);

    dgsE := sort(dgs, `>`) ;

    for i from 1 to nops(dgs) do

        a := a+ abs(op(i, dgs)-op(i, dgsE)) ;

    end do:

    a/2 ;

end proc: # R. J. Mathar, Oct 19 2015

CROSSREFS

Sequence in context: A016194 A258139 A261887 * A037853 A255237 A291954

Adjacent sequences:  A037868 A037869 A037870 * A037872 A037873 A037874

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

EXTENSIONS

Definition swapped with A037880. - R. J. Mathar, Oct 19 2015

STATUS

approved

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Last modified October 16 01:20 EDT 2019. Contains 328038 sequences. (Running on oeis4.)