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A037872
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(1/2)*Sum{|d(i)-e(i)|}, where Sum{d(i)*4^i} is base 4 representation of n and e(i) are digits d(i) in nonincreasing order, for i=0,1,...,m.
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2
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0, 0, 0, 1, 0, 0, 0, 2, 1, 0, 0, 3, 2, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 2, 1, 0, 0, 3, 2, 1, 0, 2, 2, 2, 2, 2, 1, 1, 1, 2, 1, 0, 0, 3, 2, 1, 0, 3, 3, 3, 3, 3, 2, 2, 2, 3, 2, 1, 1, 3, 2, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 3, 3, 2, 1, 2, 1, 1, 1, 1, 0, 0, 0, 2, 1, 0
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OFFSET
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1,8
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LINKS
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MAPLE
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local a, dgs, dgsE ;
a := 0 ;
dgs := convert(n, base, 4);
dgsE := sort(dgs, `>`) ;
for i from 1 to nops(dgs) do
a := a+ abs(op(i, dgs)-op(i, dgsE)) ;
end do:
a/2 ;
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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