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%I #6 Sep 14 2017 03:56:59
%S 24,21,158,142,1320,1202,1198,13348,12304,12246
%N Irregular triangle read by rows: T(n,k) (n >= 3) is the cardinality of the subsemilattice S(n,k) of the Bipartition lattice Bip(n).
%H L. Santocanale, F. Wehrung, G. Grätzer, F. Wehrung, <a href="https://doi.org/10.1007/978-3-319-44236-5_8">Generalizations of the Permutohedron</a>, in Grätzer G., Wehrung F. (eds) Lattice Theory: Special Topics and Applications. Birkhäuser, Cham, pp. 287-397.
%e card S(3, 0) = 24 ; card S(3, 1) = 21 .
%e card S(4, 0) = 158 ; card S(4, 1) = 142 .
%e card S(5, 0) = 1,320 ; card S(5, 1) = 1,202 ; card S(5, 2) = 1,198 .
%e card S(6, 0) = 13,348 ; card S(6, 1) = 12,304 ; card S(6, 2) = 12,246 .
%K nonn,tabf,more
%O 3,1
%A _N. J. A. Sloane_, Sep 13 2017
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