

A206416


Achromatic number of K_4 X K_n.


1



4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 24, 26, 28, 29, 30, 32, 33, 34, 36, 37, 38, 40
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OFFSET

1,1


REFERENCES

Hornak, Mirko and Puntigan, Jozef, On the achromatic number of K_m X K_n. In Graphs and other combinatorial topics (Prague, 1982), 118123, TeubnerTexte Math., 59, Teubner, Leipzig, 1983.
Hornak, Mirko and Pcola, Stefan, Achromatic number of K_5 X K_n for small n. Czechoslovak Math. J. 53 (128) (2003), no. 4, 963988.
Hornak, Mirko and Pcola, Stefan, Achromatic number of K_5 X K_n for large n. Discrete Math. 234 (2001), no. 13, 159169.


LINKS

Table of n, a(n) for n=1..24.


FORMULA

For n >= 25, a(n) = floor(5n/3).


CROSSREFS

Cf. A206415.
Sequence in context: A223133 A295485 A226746 * A144043 A139446 A274918
Adjacent sequences: A206413 A206414 A206415 * A206417 A206418 A206419


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Feb 07 2012


STATUS

approved



