A180053 a(1)=1, a(2)=101, a(n) = 1001*a(n-1) for n > 2.

1, 101, 101101, 101202101, 101303303101, 101404606404101, 101506011010505101, 101607517021515606101, 101709124538537121707101, 101810833663075658828808101, 101912644496738734487636909101, 102014557141235473222124546010101

Offset: 1

Author

Mark Dols, Aug 08 2010

Keywords

• nonn
• easy

Examples

			In a column:
                1
              101
           101101
        101202101
     101303303101
  101404606404101
		

Links

• Index entries for linear recurrences with constant coefficients, signature (1001).

Crossrefs

Cf. A093645.

Programs

Mathematica

LinearRecurrence[{1001}, {1, 101}, 15] (* Paolo Xausa, Jan 29 2024 *)
Join[{1},NestList[1001#&,101,10]] (* Harvey P. Dale, Jul 29 2024 *)

PARI

a(n)=max(101*1001^(n-2),1) \\ Charles R Greathouse IV, Oct 08 2011

Formula

G.f.: x(1-900*x)/(1-1001*x). - Philippe Deléham, Oct 08 2011