%I #9 Nov 15 2013 14:32:43
%S 1,11,12,13,111,112,113,121,122,123,124,131,132,133,134,135,1111,1112,
%T 1113,1121,1122,1123,1124,1131,1132,1133,1134,1135,1211,1212,1213,
%U 1221,1222,1223,1224,1231,1232,1233,1234,1235,1241,1242,1243,1244,1245,1246,1311,1312,1313,1321,1322,1323,1324,1331,1332,1333,1334
%N Elements of the sub-operad FCat(2) of TN generated by 00, 01, 02.
%C Since nonzero terms in the OEIS may not begin with 0, 1 has been added to all the digits.
%H S. Giraudo, <a href="http://arxiv.org/abs/1306.6938">Combinatorial operads from monoids</a>, arXiv preprint arXiv:1306.6938, 2013
%Y Cf. A071159.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Nov 14 2013