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Number of subsets of { 1, ..., n } containing an A.P. of length 10.
0

%I #8 Mar 30 2012 18:35:07

%S 0,0,0,0,0,0,0,0,0,0,1,3,8,20,48,112,256,576,1280,3280,7968,17840,

%T 39487,86587,188396,407230,875320,1872332,4218648,9382099,20646176,

%U 44125836,93902740

%N Number of subsets of { 1, ..., n } containing an A.P. of length 10.

%K nonn

%O 0,12

%A _David W. Wilson_