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%I #13 Jan 16 2022 22:09:26
%S 1,1,2,3,4,10,8,23,27,70,56,312,180,700,1096,2131,2068,11020,7316,
%T 34008,44232,104968,95420,531296,419654,1398500,1864674,5638352,
%U 4794088,33597760,17896832
%N Number of complementary pairs of circulant digraphs on n nodes.
%H V. A. Liskovets, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL3/LISK/Derseq.html">Some easily derivable sequences</a>, J. Integer Sequences, 3 (2000), #00.2.2.
%F Average of A049297 and A049309.
%F a(2*n) = A049297(2*n)/2; a(2*n-1) = (A049297(2*n-1) + A049309(n))/2. - _Andrew Howroyd_, Jan 16 2022
%Y Cf. A049297, A049309, A054929.
%K nonn,more
%O 1,3
%A _N. J. A. Sloane_, May 24 2000
%E a(12)-a(31) added by _Andrew Howroyd_, Jan 16 2022