A090019 a(n) = (3*10^n + 2*0^n)/5.

1, 6, 60, 600, 6000, 60000, 600000, 6000000, 60000000, 600000000, 6000000000, 60000000000, 600000000000, 6000000000000, 60000000000000, 600000000000000, 6000000000000000, 60000000000000000, 600000000000000000

Offset: 0

Author

Paul Barry, Nov 20 2003

Keywords

• easy
• nonn

Comments

Fifth column of triangle A067410.

Links

• Index entries for linear recurrences with constant coefficients, signature (10).

Programs

Mathematica

Join[{1},NestList[10#&,6,20]] (* Harvey P. Dale, Apr 02 2015 *)

Formula

G.f.: (1-4x)/(1-10x).

E.g.f.: (3*exp(10x)+2)/5 = exp(5x)(cosh(5x)+sinh(5x)/5).