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Achromatic number of K_5 X K_n.
1

%I #6 Mar 30 2012 16:52:09

%S 5,6,7,10,12,15,16,18,19,22,23,25,27,29,30,32,34,36,38,40,42,44,46,48,

%T 49,50,52,54,55,57,58,60,61,63,64,66,67,69,71,72,74,76

%N Achromatic number of K_5 X K_n.

%D 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.

%D 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.

%F For n >= 43, a(n) = floor(9n/5).

%Y Cf. A206416.

%K nonn,more

%O 1,1

%A _N. J. A. Sloane_, Feb 07 2012