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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
OFFSET
1,6
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
KEYWORD
nonn,base
EXTENSIONS
Definition swapped with A037880. - R. J. Mathar, Oct 19 2015
STATUS
approved