A330913 - OEIS

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A330913

The number of vertices formed by straight line segments mutually connecting all vertices of a semicircular polygon defined in A333642.

4

4, 8, 16, 34, 63, 113, 185, 253, 438, 638, 854, 1228, 1641, 1825, 2783, 3543, 4304, 5508, 6748, 7745, 9859, 11773, 13653, 16409, 19178, 21838, 25770, 29648, 32696, 38683, 43899, 48903, 55916, 62784, 69604, 78378, 87175, 95699, 106993, 118093, 128431, 142838

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

See A333642 for a precise definition of the polygon and images.

LINKS

Lars Blomberg, Table of n, a(n) for n = 1..100

CROSSREFS

Cf. A333642 (regions), A330911 (edges), A330914 (n-gons), A331453, A333026, A006561.

Sequence in context: A073856 A019458 A264166 * A215346 A214035 A040014

Adjacent sequences: A330910 A330911 A330912 * A330914 A330915 A330916

KEYWORD

nonn

AUTHOR

Scott R. Shannon and N. J. A. Sloane, May 02 2020

EXTENSIONS

a(21) and beyond from Lars Blomberg, May 03 2020

STATUS

approved