login
A071279
Kissing number of regular n-gon.
2
12, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
OFFSET
3,1
REFERENCES
M. S. Klamkin et al., The kissing number of the square, Math. Magazine, 68 (1995), 128-133.
L. Zhao and J. Xu, The kissing number of the regular pentagon, Discrete Math., 252 (2002), 293-298.
FORMULA
a(n) = 6 for n >= 5.
G.f.: 2*x^3*(6-2*x-x^2)/(1-x). - Elmo R. Oliveira, Jul 16 2024
CROSSREFS
Sequence in context: A090438 A346223 A128108 * A118656 A094332 A324976
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jun 26 2002
STATUS
approved