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URL: https://oeis.org/A069054
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A069054
a(1)=0 a(2)=1 a(n)=concatenate(a(n-1)a(n-2)...a(1))-a(n-1).
0
0, 1, 9, 901, 901009, 901009000901, 901009000901000000901009, 901009000901000000901009000000000000901009000901, 901009000901000000901009000000000000901009000901000000000000000000000000901009000901000000901009
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OFFSET
1,3
LINKS
Table of n, a(n) for n=1..9.
EXAMPLE
a(5)=concatenate(a(4)a(3)a(2)a(1))-a(4)=901910-901=901009
CROSSREFS
Sequence in context:
A027878
A332189
A045793
*
A283801
A015107
A024124
Adjacent sequences:
A069051
A069052
A069053
*
A069055
A069056
A069057
KEYWORD
easy
,
nonn
,
base
AUTHOR
Benoit Cloitre
, Apr 03 2002
STATUS
approved
