OFFSET
1,18
COMMENTS
This is the base-9 down-variation sequence; see A297330. - Clark Kimberling, Jan 18 2017
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
MAPLE
A037859 := proc(n)
a := 0 ;
dgs := convert(n, base, 9);
for i from 2 to nops(dgs) do
if op(i, dgs)>op(i-1, dgs) then
a := a+op(i, dgs)-op(i-1, dgs) ;
end if;
end do:
a ;
end proc: # R. J. Mathar, Oct 19 2015
MATHEMATICA
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
Definition swapped with A037850. - R. J. Mathar, Oct 19 2015
Updated by Clark Kimberling, Jan 19 2018
STATUS
approved