A330911 - OEIS

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A330911

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

5, 15, 35, 76, 142, 251, 408, 576, 947, 1367, 1845, 2600, 3460, 4011, 5822, 7386, 9023, 11423, 13967, 16242, 20330, 24235, 28222, 33686, 39327, 44967, 52733, 60608, 67383, 78947, 89530, 100040, 113885, 127791, 141925, 159356, 177158, 194895, 217232, 239662

(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), A330913 (vertices), A330914 (n-gons), A333278, A333027, A135565.

Sequence in context: A261441 A213580 A221140 * A322048 A143695 A019531

Adjacent sequences: A330908 A330909 A330910 * A330912 A330913 A330914

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