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A037877 (1/2)*Sum{|d(i)-e(i)|}, where Sum{d(i)*9^i} is base-9 representation of n and e(i) are digits d(i) in nonincreasing order, for i=0,1,...,m. 2
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 3, 2, 1, 0, 0, 0, 0, 0, 0, 4, 3, 2, 1, 0, 0, 0, 0, 0, 5, 4, 3, 2, 1, 0, 0, 0, 0, 6, 5, 4, 3, 2, 1, 0, 0, 0, 7, 6, 5, 4, 3, 2, 1, 0, 0, 8, 7, 6, 5, 4, 3, 2, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,18
LINKS
MAPLE
A037877 := 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: A289921 A219482 A037859 * A010109 A304021 A056974
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
Definition swapped with that of A037886 by R. J. Mathar, Oct 19 2015
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)