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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 (list; graph; refs; listen; history; text; internal format)
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), 118-123, Teubner-Texte 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, 963-988.

Hornak, Mirko and Pcola, Stefan, Achromatic number of K_5 X K_n for large n. Discrete Math. 234 (2001), no. 1-3, 159-169.

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

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Last modified March 8 11:34 EST 2021. Contains 341948 sequences. (Running on oeis4.)