OFFSET
1,2
LINKS
FORMULA
G.f.: x(1-900*x)/(1-1001*x). - Philippe Deléham, Oct 08 2011
EXAMPLE
In a column:
1
101
101101
101202101
101303303101
101404606404101
MATHEMATICA
LinearRecurrence[{1001}, {1, 101}, 15] (* Paolo Xausa, Jan 29 2024 *)
Join[{1}, NestList[1001#&, 101, 10]] (* Harvey P. Dale, Jul 29 2024 *)
PROG
(PARI) a(n)=max(101*1001^(n-2), 1) \\ Charles R Greathouse IV, Oct 08 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mark Dols, Aug 08 2010
STATUS
approved