A069054 a(1)=0 a(2)=1 a(n)=concatenate(a(n-1)a(n-2)...a(1))-a(n-1).

0, 1, 9, 901, 901009, 901009000901, 901009000901000000901009, 901009000901000000901009000000000000901009000901, 901009000901000000901009000000000000901009000901000000000000000000000000901009000901000000901009

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