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A033961 Number of different sets ("cut sets") of triangles a regular (n+2)-gon can be dissected into; two triangulations of an (n+2)-gon are equal if all numbers of congruent triangles coincide. 0
1, 1, 2, 2, 4, 6, 11, 17, 35, 57, 115, 203, 412, 745, 1546, 2838, 5901, 11154 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

REFERENCES

J. Dochkowa, H. Harborth and I. Mengersen, Cut set Catalan numbers, Congressus Numerantium, Proceedings of the Twenty-ninth Southeastern International Conference on Combinatorics, Graph Theory and Computing (Boca Raton, FL, 1998). Congr. Numer. 130 (1998), 133-139.

LINKS

Table of n, a(n) for n=2..19.

CROSSREFS

Sequence in context: A293014 A124346 A300797 * A298163 A201542 A000672

Adjacent sequences:  A033958 A033959 A033960 * A033962 A033963 A033964

KEYWORD

nonn

AUTHOR

Heiko Harborth (i1031901(AT)ws.rz.tu-bs.de)

STATUS

approved

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Last modified February 17 02:33 EST 2019. Contains 320200 sequences. (Running on oeis4.)