cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A146761 Period 6: repeat [0, 0, 6, 6, 3, 3].

Original entry on oeis.org

0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6, 6, 3, 3, 0, 0, 6
Offset: 0

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Author

Paul Curtz, Nov 02 2008

Keywords

Comments

Equals A002798 mod 9.

Crossrefs

Cf. A002798.

Programs

Formula

From Richard Choulet, Dec 02 2008: (Start)
a(n+6) = a(n) with a(0)=a(1)=0, a(2)=a(3)=6, a(4)=a(5)=3.
O.g.f: f(z)=a(0)+a(1)*z+...=((6*z^2+3*z^4)/((1-z)*(1+z+z^2)*(1-z+z^2))).
a(n) = 3-sqrt(3)*sin(2*Pi*n/3)-3*cos(Pi*n/3). (End)
a(n) = a(n-1) - a(n-2) + a(n-3) - a(n-4) + a(n-5) for n>4. - Wesley Ivan Hurt, Jun 18 2016
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