A130706 a(0) = 1, a(1) = 2, a(n) = 0 for n > 1.

1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset: 0

Author

Philippe Deléham, Jun 27 2007

Keywords

• easy
• nonn

Comments

Inverse binomial transform of A005408.

Decimal expansion of 3/25. - Franklin T. Adams-Watters, Mar 08 2019

2^n mod 4. - Charles R Greathouse IV, Apr 30 2019

Programs

Mathematica

RealDigits[12, 10, 100][[1]] (* Alonso del Arte, Sep 16 2016 *)

PARI

 12 \\ Charles R Greathouse IV, Sep 16 2016

Formula

G.f.: 1 + 2*x.