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A037886 a(n)=(1/2)*Sum{|d(i)-e(i)|} where Sum{d(i)*9^i) is the base 9 representation of n and e(i) are the digits d(i) in nondecreasing order. 2
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 0, 0, 1, 2, 3, 4, 5, 0, 0, 0, 0, 0, 1, 2, 3, 4, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,12

LINKS

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

MAPLE

A037886 := proc(n)

    local a, dgs, dgsE ;

    a := 0 ;

    dgs := convert(n, base, 9);

    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: A024684 A265538 A037850 * A031045 A010877 A257848

Adjacent sequences:  A037883 A037884 A037885 * A037887 A037888 A037889

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

EXTENSIONS

Definition swapped with A037877. - R. J. Mathar, Oct 19 2015

STATUS

approved

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Last modified February 19 19:20 EST 2019. Contains 320328 sequences. (Running on oeis4.)