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%I M3834 #8 Mar 30 2012 16:44:57
%S 1,5,13,45,121,413,1261,4221,13801,46365,155497,527613,1792805,
%T 6126293,20986153,72121853,248396793,857416949,2964896877,10269596445,
%U 35622421561,123728022269,430254861945,1497796774077,5219231003621
%N Related to series-parallel networks.
%D Z. A. Lomnicki, Two-terminal series-parallel networks, Adv. Appl. Prob., 4 (1972), 109-150.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%F A058352(n) + n*A000084(n).
%Y Cf. A000084, A006350, A058351, A058352, A058353, A000669.
%K nonn
%O 1,2
%A _N. J. A. Sloane_.
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