0,3

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

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

K. K.-H. Butler and G. Markowsky, Enumeration of finite topologies, Proc. 4th S-E Conf. Combin., Graph Theory, Computing, Congress. Numer. 8 (1973), 169-184.

M. Erne', Struktur- und Anzahlformeln fuer Topologien auf Endlichen Mengen, Manuscripta Math., 11 (1974), 221-259.

M. Erne' and K. Stege, Counting Finite Posets and Topologies, Order, 8 (1991), 247-265.

Index entries for sequences related to posets

E.g.f. A(x)=log(B(x)) where B(x) is e.g.f. of A001035.

Cf. A000112, A001035, A000608, A066303.

Sequence in context: A035049 A010790 A086928 this_sequence A105558 A126777 A126345

Adjacent sequences: A001924 A001925 A001926 this_sequence A001928 A001929 A001930

nonn,nice,hard

N. J. A. Sloane (njas(AT)research.att.com).

More terms from Christian G. Bower (bowerc(AT)usa.net), Dec 12 2001