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A333109
The number of vertices on an octagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
5
57, 1145, 8417, 29121, 80345, 167105, 333297, 570969, 939113, 1441153, 2153937, 3029913, 4262929, 5741473, 7606745, 9876585, 12690553, 15921777, 19922289, 24430633, 29834073, 35990065, 43151521, 51068689
OFFSET
1,1
COMMENTS
See the links in A333075 for images of the octagons.
CROSSREFS
Cf. A333075 (regions), A333076 (n-gons), A333110 (edges), A330846, A092866, A332599, A007569.
Sequence in context: A332947 A116181 A336734 * A208601 A000505 A332911
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(7)-a(24) from Lars Blomberg, May 14 2020
STATUS
approved