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A275622 Triangle read by rows: T(n,k) = number of cubic graphs with 2n nodes and packing chromatic number k (n>=2, 4 <= k <= n+2).

%I A275622 #14 Aug 04 2016 05:00:58
%S A275622 1,1,1,0,3,2,0,3,15,1,0,7,42,36,0,0,13,252,222,22,0,34,907,2685,433,1,
%T A275622 0,116,5277,21544,14050,314,0,151,22098,206334,226622
%N A275622 Triangle read by rows: T(n,k) = number of cubic graphs with 2n nodes and packing chromatic number k (n>=2, 4 <= k <= n+2).
%H A275622 Nicolas Gastineau and Olivier Togni, <a href="http://arxiv.org/abs/1403.7495">S-Packing Colorings of Cubic Graphs</a>, arXiv:1403:7495 [cs.DM], 2016.
%e A275622 Triangle begins:
%e A275622 1,
%e A275622 1,1,
%e A275622 0,3,2,
%e A275622 0,3,15,1,
%e A275622 0,7,42,36,0,
%e A275622 0,13,252,222,22,
%e A275622 0,34,907,2685,433,1,
%e A275622 0,116,5277,21544,14050,314,
%e A275622 0,151,22098,206334,226622,...
%K A275622 nonn,tabl
%O A275622 2,5
%A A275622 _N. J. A. Sloane_, Aug 04 2016