

A002713


Number of unrooted triangulations of the disk with n interior nodes and 3 nodes on the boundary.
(Formerly M3524 N1431)


4



1, 1, 1, 4, 16, 78, 457, 2938, 20118, 144113, 1065328, 8068332, 62297808, 488755938, 3886672165, 31269417102, 254141551498, 2084129777764, 17228043363781, 143432427097935, 1201853492038096, 10129428318995227, 85826173629557200
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,4


COMMENTS

These are also called [n,0]triangulations.


REFERENCES

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS



FORMULA



CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



