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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A158001 Period 6: repeat [9, 10, 9, 4, 4, 1].

Original entry on oeis.org

9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1, 9, 10, 9, 4, 4, 1
Offset: 1

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Author

Paul Curtz, Mar 11 2009

Keywords

Crossrefs

Programs

Formula

From Wesley Ivan Hurt, Jun 18 2016: (Start)
G.f.: x*(9+10*x+9*x^2+4*x^3+4*x^4+x^5)/(1-x^6).
a(n) = a(n-6) for n > 6.
a(n) = (37 - 7*cos(n*Pi) - 17*cos(n*Pi/3) - 7*cos(2*n*Pi/3) + 11*sqrt(3)*sin(n*Pi/3) - sqrt(3)*sin(2*n*Pi/3))/6. (End)
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