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A006349 Related to series-parallel networks.
(Formerly M3834)
4

%I M3834

%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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Last modified May 14 05:45 EDT 2021. Contains 343872 sequences. (Running on oeis4.)