%I M4015 #14 Dec 02 2018 04:08:11

%S 1,5,56,945,28569,1421360

%N Pseudo-bricks with n nodes.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H T. R. S. Walsh, <a href="https://doi.org/10.1016/0095-8956(82)90072-7">Counting unlabeled three-connected and homeomorphically irreducible two-connected graphs</a>, J. Combin. Theory Ser. B 32 (1982), no. 1, 12-32.

%H <a href="/index/Br#bricks">Index entries for sequences related to bricks</a>

%Y Cf. A006291, A006292.

%K nonn,more

%O 4,2

%A _N. J. A. Sloane_.