A144602 Christoffel word of slope 4/11.

0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1

Offset: 0

Author

N. J. A. Sloane, Jan 13 2009

Keywords

• nonn
• easy

Comments

The path is on the slope after 0, 15, 30, 45, 60, 75,... (A008597) steps, which gives a simple C-finite recurrence. - R. J. Mathar, May 28 2025

Crossrefs

See A144595 for further details.

Formula

a(n) = a(n-15). - R. J. Mathar, May 28 2025

G.f.: -x^3*(1+x^4+x^8+x^11) / ( (x-1)*(1+x^4+x^3+x^2+x)*(1+x+x^2)*(1-x+x^3-x^4+x^5-x^7+x^8) ). - R. J. Mathar, May 28 2025