0,3
W. G. Brown, Enumeration of non-separable planar maps, Canad. J. Math., 15 (1963), 526-545.
Reference gives generating functions.
Sequence in context: A102879 A032312 A032222 this_sequence A055727 A003500 A129876
Adjacent sequences: A046647 A046648 A046649 this_sequence A046651 A046652 A046653
nonn,easy,more
njas
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