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A056814 Triangle partitions of order n: topologically distinct ways to dissect a triangle into n triangles. 2
1, 4, 23, 180, 1806, 20198 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..7.

Ed Pegg, Jr., Triangles

Z. Skupien, A. Zak, Pair-sums packing and rainbow cliques, in Topics In Graph Theory, A tribute to A. A. and T. E. Zykovs on the occasion of A. A. Zykov's 90th birthday, ed. R. Tyshkevich, Univ. Illinois, 2013, pages 131-144, (in English and Russian).

Miroslav Vicher, Triangle Partitions

Eric Weisstein's World of Mathematics, Triangle Dissection

CROSSREFS

Cf. A053740.

Sequence in context: A089465 A220214 A106174 * A058863 A192840 A302189

Adjacent sequences:  A056811 A056812 A056813 * A056815 A056816 A056817

KEYWORD

nonn,more,nice

AUTHOR

N. J. A. Sloane, Sep 01 2000

STATUS

approved

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Last modified May 14 04:22 EDT 2021. Contains 343872 sequences. (Running on oeis4.)