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A333075 The number of regions inside an octagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. 10
80, 1488, 9312, 31552, 83432, 174816, 339816, 584176, 953416, 1463936, 2173976, 3074784, 4294080, 5790816, 7664880, 9952944, 12757088, 16036096, 20013696, 24577760, 29973528, 36161472, 43314312, 51334672 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The terms are from numeric computation - no formula for a(n) is currently known.
LINKS
Scott R. Shannon, Octagon regions for n = 1.
Scott R. Shannon, Octagon regions for n = 2.
Scott R. Shannon, Octagon regions for n = 3.
Scott R. Shannon, Octagon regions for n = 4.
Wikipedia, Octagon.
CROSSREFS
Cf. A333076 (n-gons), A333109 (vertices), A333110 (edges), A007678, A092867, A331452, A331931.
Sequence in context: A204476 A151603 A199533 * A323962 A296189 A060623
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(7)-a(24) from Lars Blomberg, May 14 2020
STATUS
approved

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Last modified March 29 08:51 EDT 2024. Contains 371268 sequences. (Running on oeis4.)